Keenstone 18650 Battery Charger, Smart Universal Charger LCD Display for Rechargeable Batteries Ni-MH Ni-Cd AA AAA Li-ion LiFePO4 IMR 10440 14500 16340 RCR123A 26650

I've been using this all day on my Li-Ion and NI-MH batteries. It has performed very well. I like that it will handle batteries up to the 26650 size (similar to C cell) and all smaller cylindrical sizes of rechargeable batteries. It will properly charge up to four cells completely independently of one another regardless of their type or size, within what is supported. Built-in safety features seem adequate to protect against situations like dead shorts, cells being inserted the wrong way, etc.Just one minor gripe - The documentation doesn't explain how to tell when a battery is fully charged. I figured that out myself by observing that the mA charging rate goes to zero, and the display stops blinking. (Verified by watching a few YouTube review videos.) Also, the final voltage (e.g. 4.22 for a healthy Li-Ion cell) displays, which gives an indication of the health of the cell. One of my older 14500s ended at 1.02 volts, so into the hazmat bin it went.I have a Zanflare branded 2-cell charger with similar features. It runs on USB power. It has one advantage over the Keenstone being reviewed here - An indicator LED that turns green when a cell is charged.

I've been through a number of similar chargers. I like this one the best.Bought this charger to exclusively charge 18650 Rechargeable batteries.What I like about this charger is each position has its own dedicated display. I don't like the Chargers where it jumps around showing you different batteries. You can monitor each battery continuously and independently.Below are the batteries I am using.https://www.amazon.com/dp/B0CDRBR2M1?ref=ppx_yo2ov_dt_b_fed_asin_title

I bought this to charge my lightsaber batteries and I'm so glad I did! You can charge multiple batteries at once. It shows the progress of the charge and how many amps/volts. Highly recommended if you need to charge multiple batteries at once.

This is a great charger. Charged AA AAA C D and 18650 lithiums to top voltage. Much better than Nitecore NewI4.

This charger works great for me. I like that you can charge 4 batteries at a time if needed, I usually just charge two. One of the charging bays has a messed up spring in it and I have to pull the lead down by hand, but I’ve gotten used to doing that, so not so much of a problem. Charging time is not that long, although I usually charge at night and take them out in the morning. It great to see when a battery is getting low on accepting a charge, I know when to replace a battery.

Great product so far I’ll leave a better review later

Well designed. I like the 120v power supply. I have no idea how a usb power supply is going to provide enough power to charge 4 batteries at once. It can charge 4 18650 or two 26650 at a time. You can adjust each bay to charge at 500ma or 1000ma.There is room to insert 26700 batteries also that I use with my automotive stick light.

It will not charge rechargeable CR123 batteries, other wise it is first class charger.