TowerTop 2/15/25 Amp Car Battery Charger, 6V/12V Fully Automatic Smart Battery Maintainer with Engine Start, Auto Desulfator, Battery Repair, Winter Mode, for All Lead-Acid and LiFePO4 Batteries

I purchased this mid October 2023. Review is almost one year of use, now end of August 2024. I use this to trickle charge the battery on a 25+ year old vehicle that loses electricity sitting in the driveway, because I hardly ever drive it. I use this device to make sure it is topped off every couple of weeks. If I drove my car daily, or at least once per week, I would not need the trickle charger. Before I purchased this conditioner, I had left my car unattended for a couple of months. Saw it on Amazon and thought I'd give it a try before having to buy a brand new battery for my old car. This device at first indicated that my car battery was unable to charge as a 12 volt car battery. Luckily this battery charger was able to step down and charge it as if it was a motorcycle battery. I thought I'd try that and get some juice into, before opting to buy a replacement battery. After a day of recharging from the lowest setting, I was able to recondition the old car battery back to life, restart the car, and be able to drive more than 100 miles on the recharged battery. Now I use it often to make sure my unused car keeps it's charge when I'm not driving it. I just wish that the unit had a physical on off toggle switch. Instead the on off of the device is by plugging it into the outlet. It's recommended to be used directly into a wall outlet and not into a strip surge protector. I use a heavy duty 10 gauge extension cable and a GFCI adapter that has an on off physical switch on the GFCI outlet for extra protection. The other thing that you have to be careful with this charger is using it when the weather is bad. Make sure you do not use this when it is raining. This trickle charger is a slow charger, which I like. It may take awhile for it to charge up the battery, maybe a few hours, depending on how depleted your vehicle battery is. I tend to not wait for the charger to reach full capacity of the battery. I charge it to 3/4 of fullness to make the battery last longer. YMMV. Overall, this battery conditioner has been a life saver.

This my second Tower Top smart charger for my RV. I've been using the Tower Top to keep my batteries charged because the charging part on my inverter went out and we have been busy moving around until we get back to home base where a new inverter/charger is waiting. I connect to my batteries plug into one of the outlets at the RV park wherever we may be and let the unit do it's thing. It's auto sensing, which is great and charges my batteries great. I definitely recommend this little unit. Very easy to use. 👍

This is the 2nd TowerTop charger I’ve purchased. This one has 2 program functions optimized for LiFePO4 batteries, which is nice. I would have given 5 stars except the fans on both chargers started to make a loud whining sound after a year or more. Granted, I use them both in high-dust environments. I replaced one of the fans with a new muffin fan I found on Amazon. Easy enough to do and works like new afterward.

Definitely worth it. I have used this multiple times for myself and to help others. If you travel, being able to jump your own vehicle without calling someone else is a huge time saver. It’s easy to charge and easy to use. I have a King Ranch that hadn’t been started in months. It turned the battery immediately. This would be a great item for your college age children or honestly any driver.

Allows multiple voltage batteries and variable speed charging. This is the best battery recharger I have ever used and owned.

I had a completely dead, high dollar battery in my Vette. This unit brought it back to life and repaired it. I had it tested with a handheld meter and the results were bad battery, replace. So, I ordered this based on the features it offered, and it worked like a charm. Next, I hooked it up to the battery in the truck and let it do its thing and wallah. Truck now starts quick just like it did the day I bought it. I read some reviews that said it would not work if battery was dead. At first, I had the same problem, but I moved the clamps from the small side post terminals where the cables screw in and attached them to the large posts on top. She came to life, and automatically detected it was an AGM and went to work. I highly recommend this unit and very happy with my purchase.

Very nice charger with multi-function capabilities. AGM, 6 volt charging, desulfinating, plus many more functions.

WTF? If your car battery is dead, this device refuses to operate. (and if my battery is not dead, I don't need a battery charger.) Total waste of money -- stay away. The only way I could charge my dead car battery with this piece of Chinese junk was to get a 6V lantern battery and clip lead it in parallel with my car battery. Then, finally, this device detected a voltage and became operational. Of course it incorrectly assumed I wanted to charge a 6V Calcium battery (whatever that is.) But at least it started charging. Then the lantern battery got super hot, the outer casing turned brown and started bubbling and emitting smoke from the + terminal. By this time the clip leads were too hot for me to disconnect them. After a few more minutes, the lantern cell began spitting caustic battery acid on my hand! I now have a hacking cough and my right middle finger is bright red and won't extend. Lawsuit incoming.

I wasn't sold on how the battery repair features would work, but they seem to bring damaged batteries back to life. In addition this little device started my truck up in -35° with its start feature.

I used it for my 2 boat batteries and it did a great job charging my deep cycle & regular battery!

This is a really great Smart Battery Charger. I wanted an electronic copy of the manual (in addition to the manual that came in the box) and after sending a quick email to TowerTop, their Customer Service team responded by sending me the pdf version of the manual within hours of my email.

I have a brand new H8 AGM that went low at -40. My 30+ year old charger just didn't work for it. This restored the battery to full charge in short order once I figured out how to swap it from 6 to 12 volts. Funny how after reading the manual things are not as clear outside in the dark with a flashlight at -20 trying to get it working. The plastic construction seems a bit fragile and might not stand up to rough treatment. My real concern is the manual says the working temperature is from 0 to 40 DegC. Well, I will probably never need it above 0 DegC. I used it at -20 and it worked fine, but the plastic construction might not like to be stored in the cold. I will store it inside in a warm atmosphere instead of the garage. Would be nice if the ad mentioned the temperature range and if it just should be stored in a warm place so it is warm when you start it or if it should never be used below freezing... that is a consideration for most of us.

It has helped many a friend.