12V Battery Charger Maintainer

I have 5 of these and they work great, never had one fail over 3 years , and does not over charge the batteries.

I put this product to an extended test, to determine, if it does what they say. It works better, than I expected. It does have an unusual way it works too. After it completes the first full charging cycle, and goes into Maintain Mode, it will stop charging for 15 minutes, and let battery settle down. The voltage on the battery will slowly fall back down to its own float voltage. 15 minutes later, it will kick back on, with voltage upwards of 14.8 volts, and holds it there, to top off the charge on battery, for 15 minutes. Then repeats this 15 minute cycle setup, as long as it is connected to battery. If a load is applied to battery, the charge cycle is repeated, until voltage on battery gets full charged, then the 15 minute cycle kicks back in. I thought at first, that the battery itself, was causing the cycle, I was seeing, but I tried it on two different batteries, one was a 5 AH, the other a 15AH, and I got the same results. Main thing is, this charger does keep your battery topped off, and ready to use. This is a very good product. And as a note, I wasn’t paid for this review, I am very happy to tell others, when I find a products that exceeds the data, in its description.

Used these devices on 2 car’s batteries when we were out of town for 2 months. Inexpensive, easy to use and worked as advertised. Cars started right up when we returned.

it's been plugged in for a week now, everything working great. I keep 2 car batteries charged in my garage to use with a inverter if needed. it's small and came with all parts needed. the clamps for battery posts are very strong and hold tight, was actually surprised, other chargers I've had weren't that strong. the only thing keeping this from the 5th star is the power cord, its short, very short, I didn't measure but I'm guessing less than 14 inches. receptacles in my garage are 40 inches high, so there it dangles like a Christmas ornament. probably perfect for under a car hood tho.

I bought this on October 24th 2024. It has been in daily use maintaining the battery on my Bobcat ZT-2009 zero turn. It just keeps trucking on and keeps my battery fully charged, especially in the Winter months. Can't beat the price.

It was so cold, minus 20 outdoors. Even though my car was in the garage the battery did not want to turn over quickly. This was easy to use, although my neighbor taught me how to safely attach to the battery and it was alright the cord hung down from the wall electrical out lit. The cord was long, the product is well made. The key lesson I took from this: I felt no stress leaving this plugged in overnight. Thank you to Amazon for the fast delivery, it is deeply appreciated.

Im ordering this same tender for the second time. First one was awesome. But they will not hold up to being dragged behind a motorcycle for 5 miles when you forget to unplug it. That was my bad. LOL

I was iffy on buying this bc of how cheap it is but it works great! I have it on a deep cycle battery that I use on a diesel heater. & it keeps it charged up when I'm not using the heater. I disconnect it while using the battery.