Manufacturer | Schumacher Electric |
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Brand | Schumacher |
Model | SC1280 |
Item Weight | 3.02 pounds |
Product Dimensions | 9.96 x 4.29 x 10.03 inches |
Country of Origin | Mexico |
Item model number | SC1280 |
Exterior | Machined |
Manufacturer Part Number | SC1280 |
Amperage | 15 Amps |
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Electric SC1280 Fully Automatic Automotive and Marine Battery Charger/Maintainer, 15A/3A 6V/12V, Grey, 1 Unit
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Purchase options and add-ons
Brand | Schumacher |
Color | black |
Product Dimensions | 9.13"D x 9.25"W x 3.5"H |
Input Voltage | 120 Volts |
Current Rating | 15 Amps |
About this item
- Powerful Charging: The SC1280 delivers a 15-amp (12-volt) charge, a 2-amp (6-volt) charge, and 3-amp maintain modes and is rated for 800 CCA batteries
- Fully Automatic: The Schumacher SC1280 automatically detects 6-volt and 12-volt batteries and when the battery is fully charged, the unit automatically stops charging and shifts to maintain mode
- Microprocessor Controlled: After gathering information from the connected battery, the microprocessor adjusts voltage and charge, allowing fast charging without negatively impacting battery capacity and longevity
- Boost Battery Health: The Schumacher Electric SC1280 features multi-stage charging and float-mode monitoring for optimum battery health and extended battery life
- Works With Many Common Battery Types: The Schumacher Electric SC1280 Fully Automatic Battery Charger and Maintainer will charge 6-volt and 12-volt standard, AGM, gel, and deep-cycle batteries
- Reverse Hook-Up Protection: With built-in advanced reverse hook-up protection, the charger protects against damage if the clamps are not properly connected
- In the Box: With your purchase, you will receive the Schumacher Electric SC1280 15-Amp 6-Volt/12-Volt Fully Automatic Battery Charger and Maintainer
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This Item Schumacher Electric SC1280 Fully Automatic Battery Charger and Maintainer for Motorcycles, Power Sports, Lawn Tractors, Cars, SUVs, Trucks, and Boats, 15 Amps, 6 Volt, 12 Volt, Black, 1 Unit | Recommendations | dummy | dummy | dummy | dummy | |
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Price | -26% $64.04$64.04 List: $86.99 | $47.08$47.08 | $299.99$299.99 | $29.99$29.99 | $67.89$67.89 | $62.97$62.97 |
Delivery | Get it as soon as Wednesday, Mar 27 | Get it as soon as Wednesday, Mar 27 | Get it as soon as Wednesday, Mar 27 | Get it as soon as Wednesday, Mar 27 | Get it Mar 26 - 27 | — |
Customer Ratings | ||||||
Easy to use | 4.5 | 4.8 | 4.7 | 4.4 | 4.8 | 4.7 |
Value for money | 4.4 | 4.9 | 4.7 | 4.3 | 5.0 | 4.6 |
Safety Features | 4.4 | — | 4.7 | 4.1 | — | 4.9 |
Versatility | 4.2 | — | — | 4.4 | — | 4.8 |
Sold By | Amazon.com | OHIO PRIME RETAIL | TopdonStarter | YONHAN | MCA Supply | HJDZUS |
input voltage | 120 volts | 4 volts | 240 volts | 110 volts | 120 volts | 110 volts of alternating current |
weight | — | 0.49 pounds | 6 pounds | 1.34 pounds | 1.1 pounds | 1.15 pounds |
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From the manufacturer
Essential Charging and Maintaining
Keep Batteries in Top Condition
Keep 12V batteries in optimum condition with the Schumacher SC1280 15A 6V/12V Fully Automatic Battery Charger and Maintainer. The SC1280 features auto voltage detection, multi-stage charging, float mode monitoring, bad battery detection, and reverse hook-up protection.
Advanced Battery Charging Technology
FLOAT MODE MONITORING
While in float mode, a battery maintainer delivers a small current when necessary to keep the unit fully charged.
MULTI-STAGE CHARGING
Keep your batteries in top condition with Schumacher’s advanced charging algorithm for optimum battery health.
BUILT-IN SAFETY
The SC1280 prevents battery damage with reverse hook-up protection, which stops the charger from operating if the clamps are reversed.
MULTI-FUNCTION DISPLAY
Use the display to check battery voltage, charging status, and percent of charge. The LEDs denote charging and maintain status and clamps reversed.
Schumacher: Performance You Can Trust
Named best in Fast Charging by Car and Driver, the Schumacher SC1280 beats the competition in quickly returning your battery to good health and a full charge.
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HOME GARAGE
Every home garage should have a quality Schumacher battery charger/maintainer.
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POWER SPORT RIDERS
The SC1280 ensures that your motorcycle, ATV, and other power sports batteries are ready to play.
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CAR RESTORERS
The unit’s maintain mode can keep your battery in top condition during restoration.
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BOATERS
The unit can be used to maintain marine batteries, although they should be maintained on shore.
Compare Schumacher Battery Chargers/Maintainers
Schumacher SC1280 | Schumacher SC1279 | Schumacher SC1282 | Schumacher SC1321 | |
Customer Reviews
|
4.6 out of 5 stars
11,611
|
4.7 out of 5 stars
951
|
4.6 out of 5 stars
1,311
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Voltage
| 6V | 12V | 12V | 12V | 6V | 12V |
Amps
| 15A | 8A | 10A | 6A |
Battery Types
| Standard, AGM, Gel | Standard, AGM, Gel | Standard, AGM, Gel | Standard, AGM |
Display Type
| Digital display | LED indicators | LED indicators | LED indicators |
Reverse Hook-up Protectionect
| Yes | Yes | Yes | Yes |
Product Description
DIY and professional mechanics trust Schumacher Electric’s extensive line of battery chargers and maintainers to keep their automotive, power sports, motorcycle, and marine batteries in top condition. The Schumacher SC1280 15-Amp 6-Volt/12-Volt Fully Automatic Battery Charger and Maintainer is specifically designed to keep your 6-volt and 12-volt batteries fully charged and in optimum health. With a 15-amp rapid charge and a 3-amp charge/maintain mode, the SC1280 charges batteries quickly and then maintains a full charge while connected. Choose the 15-amp rate for charging automotive, marine, and light truck batteries. For smaller batteries, such as those used in garden tractors, snowmobiles, and motorcycles, select the 3-amp rate. Microprocessor controlled, the Schumacher SC1280 automatically adjusts the amperage rate during charging and maintaining as necessary. The unit also features auto voltage detection, float mode monitoring to maintain optimal battery charge, and multi-stage charging. Additional features include reverse hook-up protection, bad battery detection, a digital display, LED indicators, push-button controls, and color-coded clamps. En español (ES): Los mecánicos aficionados y profesionales confían en la amplia gama de cargadores y mantenedores de baterías de Schumacher Electric para preservar las baterías de automóviles, motocicletas y embarcaciones en perfecto estado. El cargador y mantenedor de baterías totalmente automático Schumacher SC1280 de 15A y 6V/12V está específicamente diseñado para mantener sus baterías de 6V y 12V totalmente cargadas y en óptimas condiciones. Con una carga rápida de 15 A y un modo de carga/mantenimiento de 3 A, el SC1280 carga las baterías de forma rápida y luego mantiene una carga completa mientras esté conectado. Seleccione la capacidad de 15 A para cargar baterías de automóviles, embarcaciones y camiones ligeros. Para baterías más pequeñas, como las utilizadas en tractores de jardín, motos de nieve y motocicletas, seleccione la capacidad de 3A. Controlado por microprocesador, el Schumacher SC1280 ajusta automáticamente el amperaje durante la carga y el mantenimiento, según sea necesario. La unidad también cuenta con detección automática de voltaje, monitoreo en modo flotante para mantener una carga óptima de la batería y carga multietapa Entre las características adicionales se incluyen protección contra conexión inversa, detección de baterías defectuosas, una pantalla digital, indicadores LED, botones de control y pinzas codificadas por colores.
Product information
Technical Details
Additional Information
ASIN | B0797KK3N2 |
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Customer Reviews |
4.6 out of 5 stars |
Best Sellers Rank | #2,352 in Automotive (See Top 100 in Automotive) #27 in Battery Chargers |
Date First Available | February 6, 2018 |
Warranty & Support
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Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers like the portability, value, performance, readability and charging of the battery charger. For example, they mention it's very light, easy to carry and takes less space. They appreciate the great features for the price and say it works amazingly well. They also say the instructions are brief and straightforward. Customers are also impresseded with the charging speed, saying it charges up a battery safely and quickly.
AI-generated from the text of customer reviews
Customers like the performance of the battery charger. They mention that it works well, has a digital display that shows voltage and %charge, and has no problems at all. It's safe and effective inside a garage, parking lot, driveway, or for on street use.
"...It’s safe and effective inside a garage, parking lot, driveway, or for on street use...." Read more
"nice product, easy to use and works well" Read more
"...The alternator was working normally and the parasitic drain was only 10ma...." Read more
"This charge just works and works well.Very simple to use. Just hook it up and it does the rest...." Read more
Customers like the charging of the battery charger. They say it charges safely and quickly, bringing batteries back from even the lowest of charges. The charger is easy to use and charges the battery up overnight without a problem. It has 2 charge rates, 15 amp quick charge and 8 amp standard and 3 amp float. Customers also say it's an excellent charger with plenty of features.
"...Not only charges batteries, but can maintain batteries as well, and lastly, will provide voltage info on batteries in an instant...." Read more
"...The charge is effected safely and quickly, bringing batteries back from even the lowest of charge levels...." Read more
"nice product, easy to use and works well" Read more
"This works great and charges my battery very fast." Read more
Customers find the battery charger very simple to use, with brief and straight-forward instructions. They also say the buttons and lights are easy to understand and operate. Customers also say that the manual is good but not great, and the whole process more or less proceeds seamlessly. They mention that the display is easy to read and that the charger is ingenious.
"...Suitable for many different types of batteries. Instructions are brief and straight-forward." Read more
"With sturdy construction and easily understandable directions, this was my best Amazon buy ever...." Read more
"nice product, easy to use and works well" Read more
"This charge just works and works well.Very simple to use. Just hook it up and it does the rest...." Read more
Customers like the value of the battery charger. They say it is not a bad price, is very inexpensive, and is money well spent. Customers also mention that it has great features for the price.
"Love everything about this product. We'll worth the money and then some!Lightweight, but not cheaply made...." Read more
"...This charger is ingenious and well worth the money. Also extremely light weight and leads are plenty long...." Read more
"...This saved me money, a headache and more. It was extremely easy to use, compact and easy to carry. I'd give this one more stars if I could." Read more
"This charger is inexpensive and works well." Read more
Customers find the battery charger very light, easy to carry, and has a small footprint. They also say it works well and takes less space. Customers are happy with the portability and high amp charging rate.
"...We'll worth the money and then some!Lightweight, but not cheaply made. Has power cord and cables long enough to reach nearby outlets...." Read more
"...This unit is lightweight, portable, and easily carried or stored in even the smallest of trunks...." Read more
"...The Schumacher is easy to fetch because it’s light. It’s easy to position because it’s fairly small and has no exposed metal except the clamps...." Read more
"...This charger is ingenious and well worth the money. Also extremely light weight and leads are plenty long...." Read more
Customers like the battery reading of the charger. They say it can tell you the voltage of your battery before charging, and it recognizes the voltage. The charger has a digital display that shows the current voltage and percent charged. It also automatically detects the setting for the charge and monitors the battery to keep it fully charged.
"...but can maintain batteries as well, and lastly, will provide voltage info on batteries in an instant...." Read more
"...It will show if there’s a bad cell. It can also detect stratification. Charging can cause water to rise...." Read more
"...the battery has and will charge it to 100% and monitor the battery to keep it fully charged." Read more
"..." setting when that voltage of battery is connected, but fails to show the actual voltage measured at the clamps...." Read more
Customers are mixed about the battery of the charger. Some mention that they have experienced no battery issues using these chargers, and it keeps the charge for a long time. They also love the fact that they can keep their boat battery charged all the time. However, others say that the battery had gone bad and would no longer start despite being charged. They are afraid that the charger could burn out their batteries or that the light left on over night would not hold a charge.
"...Not only charges batteries, but can maintain batteries as well, and lastly, will provide voltage info on batteries in an instant...." Read more
"...Overall, it helped, but sometimes it made a battery worse. I can guess why. DC charging tends to produce bubbles...." Read more
"...This unit safely and dependably charges weak batteries, then maintains batteries by constantly sending a small trickle of electricity to make up for..." Read more
"...After charging it would start but not hold the charge. I thought I might have to buy a new battery...." Read more
Customers are mixed about the quality of the battery charger. Some mention it's well made, reliable, and dependable, while others say that it'll fail.
"...We'll worth the money and then some!Lightweight, but not cheaply made. Has power cord and cables long enough to reach nearby outlets...." Read more
"...I can guess why. DC charging tends to produce bubbles. If a gas bubble blocks a pore in a plate, continued charging can seal the pore permanently...." Read more
"With sturdy construction and easily understandable directions, this was my best Amazon buy ever...." Read more
"...the voltage up high enough that the Chineseum diesel heater errors out with an E9 error...." Read more
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Lightweight, but not cheaply made. Has power cord and cables long enough to reach nearby outlets. Not only charges batteries, but can maintain batteries as well, and lastly, will provide voltage info on batteries in an instant. Suitable for many different types of batteries. Instructions are brief and straight-forward.
The plug is standard for any outlet. I can leave this plugged in and use it during very hot or very cold weather, and in rain, sleet, snow - you name it. The charge is effected safely and quickly, bringing batteries back from even the lowest of charge levels. Once finished charging, this unit maintains the full charge even if the vehicle is unused for months. It automatically adjusts how much electricity is sent from any outlet to your battery, reducing the electricity when your battery is charged.
How much electricity is flowing from an outlet to your battery? The unit sends enough electricity to quickly and fully charge your battery. Then, it allows just a trickle of electricity to flow to your battery, so your full charge is maintained. That means you’re not overpaying for electricity, even if you plug it into an outlet and forget it. It won’t hurt batteries by overcharging, even if attached and plugged in every day of every month.
It does not get hot. It does not need attention or servicing. I can hook it up, plug it into any outlet, and leave it without worrying about anything.
It’s safe and effective inside a garage, parking lot, driveway, or for on street use. An extension cord can be used if the cord provided is not long enough, but the accompanying cord seems sufficient for most uses.
Summarizing, all batteries lose charges over time. This unit safely and dependably charges weak batteries, then maintains batteries by constantly sending a small trickle of electricity to make up for those anticipated and usual lost charges.
(I have come back to using a pointer hydrometer sometimes. It will show if there’s a bad cell. It can also detect stratification. Charging can cause water to rise. A battery won’t charge fully until the electrolyte mixes evenly. Sometimes in cold conditions, it won’t mix, and not getting a full charge occasionally, will shorten a battery’s life.)
Before checking a battery that has recently been on an alternator or charger, they say you should dissipate the surface charge by running the headlights ten seconds or letting the battery sit a few hours. In fact, it can take days. The colder a battery is, the longer it takes. An old battery may need days even at room temperature. I think “surface charge” is acid that hasn’t had time to permeate the electrolyte evenly after charging. Cold electrolyte is sluggish, and an old battery may have restricted pores.
The most common causes of battery failure are chronic undercharging (sulfate remains on plates long enough to harden), and chronic overcharging, ( plate material corrodes and flakes off). They’re bound to happen with DC charging. Manufacturers of alternators and chargers want a voltage that’s a happy medium.
I’d occasionally put an undercharged battery on a regulated charger overnight. Overall, it helped, but sometimes it made a battery worse. I can guess why. DC charging tends to produce bubbles. If a gas bubble blocks a pore in a plate, continued charging can seal the pore permanently. Also, in a low-maintenance battery, DC charging can cause calcium in a positive grid gradually to migrate to the lead oxide, grab oxygen, and form an insulating layer of calcium oxide.
Early in 2002, a neighbor discarded a 2-year-old battery that was out of warranty and would no longer start his car. Several months later, I used it to test an antique Sears charger I’d found. The charger restored it so well that I put it on my car. Every three months, I’d charge it overnight. That derelict battery gave me 11 years of reliable service.
An oscilloscope showed me that instead of DC, the charger produced 2-millisecond pulses. Charles Cady had invented it in 1959. He didn’t say it would restore a battery. He said it could continually charge a battery without damaging it. Nowadays, most smart chargers seem to use pulses. Battery chemistry can recover between pulses. Hydrogen and oxygen ions can better form water instead of bubbles. Metals like calcium tend less to migrate.
A scope showed that the Schumacher SC-1200A/CA was charging my car battery in bursts of 50 milliseconds approximately 500 milliseconds apart. The microprocessor probably changes the timing according to conditions. I know it changes the voltage. Sometimes it will charge at ~13.2 all the way to shutoff. Other times, it will switch to ~15.5 to top the battery off. It may start ~15.5.
When I topped off a battery that was at 98%, I watched the Schumacher apply 15.5 volts for half an hour. I had the filler caps off to watch the plates and electrolyte with a flashlight. With a DC charger, I would have expected to see bubbles sticking to the plates. I didn’t see any.
The Schumacher is easy to fetch because it’s light. It’s easy to position because it’s fairly small and has no exposed metal except the clamps. When turned on, the charger takes 20 seconds to show a percentage estimate. Then it applies a trickle charge for a minute before beginning to ramp up to a rate that seems to depend on what the microprocessor has detected about the battery.
I’ve read complaints that it may shut off too soon. Schumacher’s FAQ says it can happen with a cold battery. I tried it when my battery was at 25 F. It was at 77% charge, so it should have required at least 10 amp hours. In less than 1 amp hour, the charger said it was charged and shut off. The sluggish mixing of frigid electrolyte must have fooled the processor. (I think the sluggish electrolyte also affected my voltage check. Opening the door to release the hood latch would have pulled down the voltage a little, and it would have recovered slowly. It was probably about 82% charged.) In the cold, I could have used a manual charger, but there was no urgency, and maybe charging with sluggish electrolyte is a bad idea, anyway.
Even at mild temperatures, when I check voltage the next day, I may find that the charger shut off a little too soon. Maybe the acid needed more time to mix. No problem. When I get a chance, I let the charger top it off.
It’s the best lead-acid charger I’ve used, but I’ve found annoyances.
1. The 20-page manual is made of 5 sheets of 8.5 x 11” paper. It tells the user to read it before each use, but that’s asking a lot. It’s poorly organized and in two languages. With an extra sheet of paper, they could staple two 12-page manuals, English and Spanish, each with a table of contents and the important reminders visible at a glance.
2. The manual hasn’t been proofread. For example, Section 2 on page 2 says it’s only for 6-volt batteries of 24 AH and 12-volt batteries of 44-75 AH, and it’s only for starter batteries. That’s ridiculous. Page 6 contradicts these limitations, using batteries of 8 to 105 AH and 300 to 1000 CCA as examples.
3. Page 9 says if it fails within 2 years, Customer Service will give you an RMA. After several months, I noticed page 19, at the end of the Spanish section. It has two warranty-program-registration coupons, one in Spanish, and one in English. It says you should cut it out and mail it in within 30 days of purchase. It doesn’t actually say I’ve waived my warranty, but it implies it. I don’t like that.
4. The labels for the nine lights and two buttons are small like newspaper text. If the light isn’t good, I need to fetch reading glasses and maybe a flashlight. The display stays on only a minute. After that, if I want to check, I have to push a button. Accidentally pushing twice will shut the charger off.
5.The percent reading can say 75% when a battery is 97% charged or 34% when it’s completely discharged. The reading can rise impossibly fast or stay the same while a couple of amp hours go into the battery. The percent display is bound to be problematic. Schumacher’s FAQ says it shuts off by recognizing a charging curve, and it’s most accurate if left alone. There wouldn’t be much of a curve at the start.
6. There is no ammeter. I keep my Kill-a-watt P4400 (under $20) on the end of the power cord. The charger produces about 1 amp for every 20 watts input, so the watt meter serves as an ammeter. It also keeps track of how long the charger has been plugged in and how many amp hours have gone to the battery. The KWH display reads to 0.01. I ignore the decimal and divide by two: 0.08 KWH means 4 amp hours went into the battery.
7. The manual says it’s charged when the green light pulsates (growing dim every 8 seconds). The charger may display 100% and a green light long before that. After I became aware of the green light, I’ve seen it continue to charge at 4.5 amps for 25 minutes or 3 amps for 50 minutes, before it switched off and the light pulsated.
Another time, I watched the green light for two hours as the current tapered from 4 amps to 1 amp and finally shut off, and the light started to pulse. Since then, the battery’s impedance has been lower than before, so I think maybe desulfation took place. If a steady green light indicates “desulfation mode,” perhaps Schumacher doesn’t say it because some experts say there’s no such thing.
A processor may use “zero delta,” a point when charging voltage stops rising, to determine when charging is complete. Instead of desulfation, a steady green light might mean ambiguity, that charging is complete according to the computed curve, but zero delta has not been detected. A third possibility is that a steady green means both. The SC-1200A-CA designers may have found that if the processor doesn’t see zero delta, that means optional extra charging is in order, to clear up old sulfate.
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A car had sat in a neighbor's yard two months. She said the battery had been run down trying to start it after running out of gas. I thought maybe air had to be purged through the injectors. The battery would only click the solenoid, although my meter and my charger both said it was 50% charged. At one time, I would have thought a battery that sulfated should be junked.
After charging, the battery gave me a lot of rapid cranking (resting about half the time). When it slowed slightly, I recharged it. The second time, it performed significantly longer than the first.
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I've read that the SC-1200A-CA wouldn't charge a battery if the voltage had fallen too low. A neighbor's car battery was down to 0.8 V. I thought I’d have to start out with a dumb charger, but the SC-1200A/CA had no trouble. If sometimes this model hasn’t worked on a low battery, maybe the temperature of the battery was a factor.
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A neighbor has an antique that may require extensive cranking because it may sit for months and the choke doesn’t work. He’d sometimes leave his manual charger on the battery for days. One day when it sounded very week, I let my Schumacher put 48 AH into it. The next day, I found that the voltage had hardly risen, and now it wouldn’t turn the engine.
Strangely, after it sat on the ground several weeks, the Schumacher charged it quickly. The engine needed a lot of cranking the next day. The battery provided an outstanding 11 cranking volts, and it didn’t slow at all. Another rejuvenation!
Apparently, four years of overcharging with DC had caused calcium oxide to build up until the plates could not be charged. My first attempt to charge must have broken down the calcium oxide, but the freed calcium needed time to migrate back into the grid alloy.
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My two-year battery was three years old when I bought the SC-1200-A/CA. The battery charged at 3 amps, which was slower than similar batteries, and it supplied less voltage to headlights. After a year, I tried something new. Before topping it off with the charger, I used the parking lights to draw it down about 20%. Since then, it has charged at 4.5 amps and supplied more voltage to headlights. I guess 1-second bursts of cranking aren’t enough exercise to keep a starter battery in shape.
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A neighbor was about to replace a pair of 35 AH AGM wheelchair batteries because they were good for only 20 minutes of intermittent use. The wheelchair used an automatic DC charger. I put a 6 amp load on each of them for two hours, then charged with my SC-1200A/CA. His chair was faster than before, and he he said it would go all day on a charge.
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I’d owned the charger 10 months when it quit working. The display said it was charging, but the watt meter showed that it had shut off after a minute. I tried three times with two batteries. It had worked the day before, but two days before, there had been a drizzling shower while I was charging in the carport. The case hadn’t gotten wet, but maybe the cooling fan had drawn in moisture. I put the charger in a warm, dry place (115 F) for three hours. When I plugged it in, it worked again.
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I'd had the charger two years when I went to top off my car battery. According to the state of charge, it needed more than 10 amp hours, but after 2 amp hours, the charger switched to a pulsing green light and said it was fully charged. A test instrument found that I had more than a milliohm of resistance at the connections between the battery posts and terminals. I clipped the charger directly to the battery posts, and it gave the battery another 11 amp hours. I guess a tiny bit of resistance can fool the charger's processor, and it works most reliably when clipped directly to the battery posts.
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When my two-year battery was five years old, it began self-discharging at 5% per day, dropping by 1/3 in a week and 1/2 in ten days. The alternator was working normally and the parasitic drain was only 10ma.
I’d always thought that a car battery that wouldn’t hold a charge had to be replaced. With nothing to lose, I turned on the lights to draw it down about 20%, then charged with the SC-1200-A/CA. That was six months ago. It has been fine ever since. Dendrites can grow like cobwebs in a battery, forming paths for self-discharge. It looks as if the smart charger cleaned up the dendrites.
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I'd owned it 3-1/2 years when I again encountered the problem where the amber light said it was charging but the watt meter said it wasn't. Twenty minutes in a warm oven got it working. I got it apart by removing four screws. Two were under the lower corners of the display panel sticker. Inside I found a bit of leaf, showing that the fan can draw in debris. In one of the intakes was silk thread as if a bug had begun spinning a cocoon. The processor was soldered to a board on the display panel. The leads had no protection to keep dirt and dampness between leads from causing trouble.
I cleaned it with contact cleaner and a brush. One of these days, I'll take it apart again and spray on a conformal coating. This is a sensitive circuit that's bound to get dirt and humidity from the cooling air. I'm disappointed that Schumacher didn't apply a protective coating.
Very simple to use. Just hook it up and it does the rest.
It recovered low/near dead battery and when it's done it automaticly changes the charging mode to maintain mode.
Top reviews from other countries
Charger trip my home circuit breaker
waiting for Amazon to pick up return item
Not recommended