OptiMate Lithium 4s 6A, TM391, 10-step 12.8V 6A Lithium Expert Battery Saving Charger & Maintainer, Blue/Green

I did a lot of research and I have used many different brands of chargers. The OptiMate series of chargers can't be beat. They are the most sophisticated and problem free chargers out there. I have a number of them and they always do the job. I have even been able to bring a couple of batteries back to life. Highly recommend this product in its many superior forms.

The manual has many modes of operation but it also functions perfect for a plug and play. I have a lithium ion battery on my motorcycle and it has kept the battery healthy in periods of no use.

Very nice system. Recommended for EarthX batteries. Instructions could be a little clearer. The thing I like is you can permanent leads that can be installed on the battery. This allows you to manage the battery from a location without direct access to the battery.

Lithium charger brought back my dead Lithium battery. I had to jump it with another lithium battery to get my dead lithium battery over 12 volts but after that my dead battery took a charge and completely recharged.

It did NOT save 2 dead Lithium batteries, but that's not the chargers fault, I guess they were just to far gone. The thing has some weight to it. It doesn't feel like a cheap piece of plastic junk. I am using it to maintain a lithium battery, and for that it is overpriced imo.

Complicated instructions when it comes to all the features but works to keep my Shorai Lithium Battery LFX36L3-BS12, properly charged.

10/10

I bought this to maintain my EarthX battery over the winter months. So far it is performing well.

Good kit works great

Higher current charger enables me to reuse this for any other sized batteries I may have. BMS reset feature looks handy but have not had a chance to use it. Case seems really sturdy compared to other trickle charges I have, but they are rated 1 Amp and below...

Very nice charger but it is pricey compared to other models. That being said I love the quality of Optimate chargers and have several and they have all been reliable and helpful.

OK