Miboxer C4 V3 Universal 18650 Charger 4 Slots for Rechargeable Batteries Ni-MH Ni-Cd AA AAA Li-ion LiFePO4 IMR ICR 10340 18650 26650 21700 with Protect Board

We have tons of rechargeable batteries and all different sizes. AAA to the 28650 yes they will charge up 28650. We use them in security lights and big powerful flashlights. I'm always using these. I got two of these and they work well with our solar system to charge things up. You can add different batteries into each slot it shows the type of cell, how much energy is left, and the rate of change along with a host of other information about each cell. We have had these for over 1 year with no issues. You can't go wrong. Like I said we use these daily I would like to try there bigger version of this charger I'm sure it will work as well.

This review is for the C4 unit and only LiFePo4 14430 batteries.Keeping this short, this unit does charge my batteries but getting them into the slot properly is always way too difficult. There doesn't appear to be any position where you sense the battery's clicked in securely, mostly because the positive contact has two dimples that may fit another kind of battery but pressing the 14430's into position it doesn't detect them at all. I need to fiddle around moving the battery until it finally registers, and then it's easily knocked out when inserting the next battery. Either I'm missing some kind of adapter for the batteries or there's possibly an error in the description. It does list these batteries as compatible. I'm using a mix of Ultralast and a generic brand.Otherwise I'd give it a 4. But not 5 because I'd also like to see some way of stowing the cable onboard when not in use and LiFePO4 is not automatically detected (and this is stated in the manual, that they would need to be manually selected). But it did charge my batteries, so there's that.

I have a Lacrosse BC-700 and this is just as good with the exception there is only one battery refresh, capacity test bay. I got this for 18650 charging. It charges well. I've had it for a couple of months and use every day. My Lacrosse and the MiBoxer have rejuvenated over 50 NiMH batteries, (AAA,AA, & C). Nice to be able to rejuvenate and capacity tes C batteries. My only con is wish all four bays did capacity testing.

Received the charger sooner than tracking showed. Took me a few minutes to figure the charger out. The easy way worked perfectly. Plug the unit in and install batteries (18650 3.7V l-ions). It charged all four of them in a very short time. I also had one battery that was behaving abnormally. I put it in the cell 4 location as stated in the guide and it took 8 hours for the charger to repair the battery and charge it to 100%. Great little unit. PJ

This is the 3rd generation, which works with protected 21700s. The MiBoxer C4 gen 2 does not. The batteries are spaces together further apart than most, to allow easy access to each battery. I also like that it includes the AC power supply, so you don't need a wall wart/power cube to plug it in. There is no USB output, but I wasn't looking for one.This unit is pretty unique in handling the longer 21700 protected cells easily.

Sure much better than the ones that come with batteries and flash lights. Also great to be able to use on any type rechargeable I have ( less clutter). So far I have used on Nicad, Nmhd and 16850 Not enough time to evaluate battery life yet

I followed the C4 details, contained in your directions, with regard to discharge for calculating battery capacity. I spent hours trying to make it work to of no avail. It does charge, though .... Suggestions? How do I make it work.

This is a great little charger for your vape batteries or anything else you want to charge. Mainly I use it for 18650 lion ion batteries that I use in multiple devices.