|Item Weight||1 pounds|
|Product Dimensions||4 x 3 x 12 inches|
|California residents||Click here for Proposition 65 warning|
|Item model number||SC-1200A/CA|
|Manufacturer Part Number||SC1200A/CA|
|OEM Part Number||SC-1200A|
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Schumacher SC-1200A-CA SpeedCharge 12Amp 6/12V Fully Automatic Battery Charger
|Price:||$42.68 & FREE Shipping. Details|
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- 12A Rapid Charger
- 6A Charger
- 3A Maintainer for Premium Charging Applications
- 12 Amp fully automatic microprocessor controlled battery charger
- Automatically adjusts the amperage rate to charge and maintain batteries
- Features float mode monitoring
- Auto Voltage Detection automatically detects 6 or 12 Volt batteries
- Reverse hook-up protection with LED indicator
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This item Schumacher SC-1200A-CA SpeedCharge 12Amp 6/12V Fully Automatic Battery Charger
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|Item Dimensions||3 x 4 x 12 in||12 x 4 x 8 in||11.75 x 15.25 x 10.5 in||10.75 x 3.34 x 7.5 in||5.8 x 12.4 x 9.9 in||10.5 x 5.25 x 8.25 in|
This is a 6V/12V 12 Amp fully automatic microprocessor controlled battery charger for premium charging applications. With 6V/12V auto voltage detection, this charger can do 3 Amp for maintaining, 6 Amp for medium charging and 12 Amp rapid charging, with a digital display. Also has reverse hook-up protection so the unit will not operate if clamps are reversed, and float mode monitoring. Energy efficient and eco-friendly.
The Schumacher SC-1200A/CA SpeedCharge is a fully automatic battery charger that uses advanced technology to charge up to twice as fast as conventional chargers. Automatically adjusts the amperage rate to charge and maintain batteries efficiently. The 50-amp clamps are compatible with both top and side-mounted battery posts. Its easy-to-read LED indicators show battery charge status at a glance. Quickly charge and maintain conventional automotive batteries, deep-cycle, AGM, and gel cell batteries.
Multiple Charging Modes
Automatically adjusts the amperage rate to quickly charge all types and sizes of batteries. The charger monitors battery condition and adjusts charge rate downward to prevent battery damage for car, truck, marine, RV, and farm equipment batteries. Also adjusts automatically to Slow Charge, a trickle setting for charging and maintaining small batteries, such as those for motorcycles, ATVs, snowmobiles and lawn tractors.
Sturdy, Built-In Handle
The built-in, retractable handle serves as convenient cord wrap for the 50-amp clamps and power cord, in addition to providing easy portability.
Microprocessor Controlled Technology with multi-stage charging lets the Schumacher SC-1200A/CA deliver added precision, safety, and battery life. This technology lets you charge your motorcycle, car, or utility vehicle batteries up to 2x faster than using conventional chargers.
Fully Automatic Operation
The SC-1200A/CA automatically switches from Continuous Charge to Float-Mode Monitoring, which allows the charger to maintain the battery when fully charged. The SC-1200A/CA resumes continuous charging when the battery becomes discharged.
- Input Voltage: 120V AC
- Output Voltage: 12VDC
- Output Power: 3A/8A/12A continuous
- Amperage Control: Push-button
- RoHS Compliant: Yes
- Energy Star Compliant: No
- Certifications: UL, CUL
- Warranty: 2 Year
- Dimensions: 7.6" x 3.5" x 9.8"
- Weight: 3.1lbs
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Top Customer Reviews
Some people complained it will not charge a totaly dead battery.
This is safety feature so it will not turn on if nothing is hooked up it.
To charge a dead battery - you have to give it a little pre charge to get it to about 1 volt so the charger knows something is actually hooked up to to it.
To do this:
1. unplug charger from wall
2. hook battery to charger
3. press and hold "display" and "type" button at the same time
4. while holding those buttons - plug the charger into wall.
* this will bypass safety features and charge the battery even if it is dead (assuming the battery can be charged at all)
- do not run in this mode for more then 5 minutes or you can damage unit and battery.
- this will get the battery enough of a charge so that the charger can detect a battery is hooked up to it (1 volt) .
5. unplug charger from wall.
6. wait 30 seconds and plug in charger into the wall. This will put it back into 'regular' mode and start charging your batter properly
I used to put batteries on a regulated charger overnight to clean up sulfate. Often, I couldn’t fully charge a battery (maybe hardened sulfate). Hours on a charger could make a battery worse. Charging can cause bubbles to block pores. Continued charging can permanently seal blocked pores. DC charging voltage can cause metals to migrate. In a low-maintenance battery, calcium in a positive grid can migrate to the surface, grab oxygen from the lead oxide, and form an insulating layer of calcium oxide.
Early in 2002, a neighbor discarded a 2-year-old battery because it would no longer start his car and the warranty had expired. 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 for lead-acid and flashlight batteries seem to use pulses. Battery chemistry can recover in the milliseconds 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 bursts pulsated by 0.1 volt at high frequency. 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. Apparently, it depends on what the microprocessor senses.
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. In my experience, a battery that's gassing looks like a glass of champagne. Occasionally, a bubble would rise, but I saw none on surfaces. If bubbles weren't sticking, they probably weren't blocking pores.
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.
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. There's no ammeter. 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.
6. 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.
The percent display is bound to be problematic. Schumacher’s FAQ says the microprocessor 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. Recent charge or discharge current, temperature, stratification, calcium oxide, or hardened sulfate could probably throw the initial estimate way off. The FAQ says a cold battery may fool the microprocessor into shutting off too soon.
A microprocessor knows a lead-acid battery is fully charged when the voltage rise (delta) drops to zero. I suppose a solid green means the battery is charged according to the computed curve, but the processor is awaiting a zero delta. (To protect the battery, I suppose the processor will shut off the charger before long, anyway.) Checking voltage the next day, I sometimes find that the charger shut off a little too soon. The charger will do better the second time.
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.
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. Rejuvenation!
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. My charger worked. It looks as if Schumacher keeps improving the programming of their microprocessors.
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 for days. One day when it sounded very week and the voltage was unusually low, I let my Schumacher put 48 AH into it. After letting it settle overnight, I found that the voltage had hardly risen, and now it wouldn’t turn the engine.
I was sure the battery was junk, but after it sat on the ground several weeks, the Schumacher charged it quickly. Having sat for months, the engine needed a lot of cranking the next day. The battery provided 11 cranking volts, which would be outstanding for a new battery, 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 weeks to migrate back into the grid alloy.
After 42 months, the AGM battery in my riding mower would give out if the engine didn’t start immediately. It reminded me of memory in nickel flashlight batteries. Discharging and recharging with a smart charger, perhaps several times, may rejuvenate a nickel battery.
I used the mower’s 9-ohm blade clutch for several hours to run the battery down to 8 volts, then charged with the SC-1200A. The battery now provided 11 volts while cranking, which was better than new. I cycled it twice more to increase the capacity to 9 AH, out of an advertised 12 AH. More improvement may be possible.
A neighbor complained that after a year, the AGM batteries in his wheelchair would provide only 20 minutes of intermittent operation on a charge. I cycled them once with my Schumacher and the improvement amazed him. I’ll bet it could also rejuvenate UPS batteries.
I’d owned the charger 10 months when it quit working. The display showed 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.
Finally it stop working.
This charger is VERY light weight and easy to use.
Also, Digital display showing how much percentage battery has is very useful before charge and during charge.
I have 2 trickle chargers and 2 jump starters (portable battery ?) for 3 cars and 1 motorcycle, I don't need Start function but someone who like to charge dead (0%) battery or want immediate jump start car, this may not fit to your needs.
Also, this is nothing bothers me but
* Picture of product shows 12, 8, 2 A
but actual product we receive is
12 and 3A
* Picture shows Standard, AGM, Gel Cell
but actural product we receive is
STD or AGM
* Picture shows Display mode button
but actual product we receive is no user choice for display
Charger cycle display V and % automatically, you have to wait for charger shows whichever you want to see.
Usually it start with Voltage I wait for few seconds (10-15 seconds?) till it shows how much percentage battery has.
It goes dim (power saver mode ?) after few minutes, you need to hit one of button then display shows V and % cycling.