TecmateOptiMATE TM-271 Lithium 4s 9.5A / 5s 7.5A, 10-step 12.8V / 16V Sealed Battery Saving Charger and Maintainer

Very easy to use. I like that it is constantly assessing the health of your Lithium Iron phosphate battery and keeps at 100% charge. I've only had it a few months, so I can't speak yet to how well it prolongs the battery life, but it's maintenance program makes sense that it will.

I bought four of these chargers. Two have failed to date (within six months of purchase). I responded to the manufacturer, but haven't received a response after more than a week. Purchased 11-18. No response in six months.1/10/20--Still no response from anyone. You'd expect a response for a good quality product.It looks like this product might be discontinued. I wonder if others had similar issues and the product was replaced with a better product.At this point, I would not buy a Tecmate product as their Customer Service seems to be non-existent.8/3/20--Still no response from Amazon or the manufacturer (Tecmate)Three of the four chargers have failed with minimal usage.

Great product, amazing customer service got back to me right away and went out of their way to help me. Couldn’t be happier

A must have if your bike has a lithium battery to save on weight.

This charger is a great addition to the antigravity battery that I recently purchased. Plug it in and walk away. The charger takes care of the rest.

Excellant transaction. Highly recommend!

Order this charger for 16 vots and got the wrong one in box. Dosent do 16 volts.

Simple easy to use charger that automatically detects what battery you’re charging…what’s not to like.