I've used this on AGM as well as standard lead acid batteries. It's very straightforward and simple to use. It charges to the point of switching to maintenance charge rate automatically or it bails out when the battery is not salvageable. Very satisfied with this purchase. It's inexpensive and very effective and a worthwhile upgrade from a very old charger that I have.

Cumple con su función, es práctico, cuenta con 2 sistemas de carga, y te indica si la batería funciona, o si se encuentra dañada.

The Schumacher 1280 is an automotive battery charger, but it is also much more.First, like most battery chargers in the $50-100 range, it allows you to charge your battery at 2 "speeds": the first, at 3 amp, is intended as a traditional "trickle charger," one that can be used to keep your battery in optimal condition and thereby extend its life and reliability. I live in a cold climate (Minneapolis) and tend to use my car only to get around town, sometimes not using the car at all on some days. This combination means my car doesn't get the sort of highway miles to keep the battery fully charged month after month, and the demands of getting it to crank up on subzero mornings is demanding. Buying this charger is bringing me peace of mind and will be financially rewarding over the long haul.Second, my Schumacher has allowed me to get my recently drained battery up and running in impressively short time. I bought it largely for this purpose--after I drained a 4-year twice this summer, replaced it, and then did the same recently with the new one. In its 15 amp mode, my Schumacher successfully desulfinated my current battery (i.e. a necessary first step to clean up the crap that accumulates inside a battery) and then charged it fully in about 6 hours. I had read that this process might well take 24-48 hrs. if done with a lower-amp charger, or might involve leaving a car overnight at a shop if I'd done it there.Most importantly, though, my Schumacher did this while giving me detailed information that let me follow the process and let me an important bit of information about the state of my battery once it was fully recharged. Its well lit LED display tells you when it begins the desalination process, the % charged as it does its thing, and the final voltage of the battery once it's done. The first two of these eliminate the guessing you'd experience with comparably priced charger. (On others you plug it in. . . and blindly wait). The voltage at the end of the process gives a good assessment of the state of the charged battery. In optimal condition, a battery should have 12.6-12.8 volts (mine was 12.6!); if its losing its abilities as a battery, it will have 12.0 volts or less. In a nutshell it tells you what to expect from your battery going forward.Going forward I'm planning to keep track of how my battery's charge and voltage change over time. For me, I'm hoping the pattern will provide clues whether something beyond my forgetfulness with inside lights has been at play.)The display also tells you if it can't successfully complete the desulfation process, in which case you'll know your battery is a goner; if you improperly hooked up the charging cables; when it's completed charging and successfully shifted to standby mode, thereby assuring you its not overcharged your battery; and more. The whole process more or less proceeds seamlessly. You simply turn the charger on (or wait for it to come on automatically after 30 seconds), choose the amperage (3 amps or 15 amps), and indicate the type of battery you own (most of us own standard wet cell batteries with fill-up ports on the top; this isn't hard to figure out).I should also note that I chose the Schumacher 1280 only after going online and looking at a couple of websites that I knew and trusted (Car and Driver; CNET). Both spoke glowingly about Schumacher's reputation and the advanced-for-its price range features that its 1280 and near sib 1281 offer in their price ranges.

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The Schumacher car battery charger is compact and easy to use. Since I’m not taking my car out as much and it’s very cold, I just plug it in at night and it’s ready for the morning. My car starts right away. I like it because I can use it myself and don’t have to bother anyone to give me a boost. Very happy with this product.

I already own four different name brands of battery chargers. From an old Sears 10 amp charger from the 1970’s to more modern ones purchased within the last five years. I’ve found not all chargers are meant for todays battery applications. My RV takes marine batteries in its living compartment area. Unfortunately, some chargers say they are good for marine applications, but they are not. I’ve dreaded buying another battery charger for over a year now when I noticed back then the Schumacher brand of chargers. I thought to myself, another company making a charger that looks good, but what of its performance. I found one on Amazon Prime I felt was a decent price and felt, oh well, if its another typical charger, I wont feel so bad over the money spent. According to my so-called other charger I already had, the display showed I need to replace the one marine battery in the RV and the dead marine battery that was sitting in my back yard that was taken out of the RV over a year ago. The Schumacher charger arrived. I was blown away of hoe light the package was. My mind began to think, another charger that looks good in the picture but performs horribly. I read the directions fully (I truly did), and began to hook up my RV marine battery. The layout of the charger seemed simple enough. The display was easy to understand. Ok, the moment of truth was at hand. I placed the charging mode into fast charging, I activated the mode for the marine battery application and began my charge. When the charging began, the display showed about 9% starting charge. I returned to the charger later and it was at over 50%. Later it showed 80%. Since this is a marine battery, I stopped it at this point. I loved how this Schumacher charger display changed back and forth from the percentage rate of charge to the volts of the battery. I began using different things in my RV and was totally amazed the seemed newness of how things inside were now working. The lag time of certain things working were no longer there. The lights were brighter than ever. Best the all, my charger never seemed to overheat. Believe me, I constantly checked the casing of the charger for smell and overheating. Note, to you future users. What I didn’t realize at first was, when you first hook up the charger to a battery, it does not immediately turn on for charging. The display comes on so you can see the initial percentage of the battery and the display of mode selection. Press the on/off button, the display will say ON. Press the desired charging mode and desired battery type, and the Schumacher Battery Charger does the rest. Oh and BTW, remember the dead battery in my back yard!, The Schumacher charger brought it back to life. It’s now an extra inline battery in my RV. I used the Schumacher to charge my auto batteries to peak performance. I salute the Schumacher company in making a great product. Now wish I had purchased it over a year ago. For anyone willing to purchase this item, it is my opinion, this will be an essential item to your automotive work bench.I highly recommend this product!

Very poor instructionsCharger trip my home circuit breakerwaiting for Amazon to pick up return itemNot recommended

This is a great small portable charger for RV batteries and automotive batteries. Its nice to see the charge level and voltage of the batteries, this unit does what I need and recommend it to anyone who needs a battery charger for automotive and RV batteries. So far it's been great.