Battery Tender 4 AMP Battery Charger and Maintainer - Automotive Switchable 12V or 6V Smart Automatic for Cars SUVs and Trucks - Lead Acid, AGM, Gel, & Lithium Battery Charger - 022-0209-BT-WH

This 4 AMP battery charger works great! It’s super easy to use. You really don’t need the instructions for the most part. It’s a very good value for the money.

I have been using this battery tender on my boat for quite some time. My batteries always stay fully charged thanks to it. The tender maintains the batteries even through the cold winter. Come spring time i'm confident in taking my boat out onto the water again. Additionally I have never worried about overcharging the batteries because this tender has built in safeguards against it. It's been a solid purchase and I would recommend it for Boats, lawn equipment and anything else Having a 12 volt battery system.

A really nice charger that can charge a wide variety of batteries. Four amps gets the job done quickly without risking battery damage, and the charger can be left in ‘float’ mode (which is automatically engaged once the battery is fully charged) indefinitely without fear of battery damage. There are more expensive chargers which are all dressed up to look more modern and sophisticated, but to my mind they offer nothing more than this charger. Highly recommended.

Perfect size for our use. Cold weather we need to make sure vehicles are good to go. Medium price for unit. Easy to use. Can read it without glasses

I have 6 of these for my 6 cars which I use when I travel. They just work great. No more dead batteries when I return home

This Battery Tender has been working great thus far. I primarily use it to keep my RV Batteries charged when stored throughout the winter months. I will occasionally use it for my lawnmower battery. I docked it 1 star simply because it wouldn't charge a Lithium Motorcycle battery. I connected it and after powering on the Tender, it automatically selected AGM. I tried to manually switch it to Lithium, but it wouldn't switch. After doing some Google research, I found that many people have issues getting the Tender to charge Lithium, even though it clearly says that it can charge it. It may have charged it on the AGM setting, however I didn't want to risk it on such an expensive battery. This Tender works great for most applications, but if you're looking to charge Lithium, I would go with a Lithium specific charger for it.

Lite weight

Seems to work well so far. Have used this brand for decades, just upgraded to 4amp.