18650 Rapid Charger 3A Miboxer C4-12 4 Bay AAA AA Battery Charger 18650 for NiMH NiCd AA AAA C D Cell 26650 18490 RCR123

Purchased 3 weeks ago, so I can't speak to durability yet but everything else about the device is better than my expectations. It was bought as a replacement to an XTAR VC4 which I was happy with for nearly 2 years until it finally stopped working. This unit was slightly more money than a few others but I did some research and decided on this. Here's my impression so far. First, it charges my 18650 3000 mah batteries FAST. About 3 times faster than the old one. Second, large slots that make it easy to get batteries in an out (the last unit I struggled with the inner slots if there were batteries next to each other). Third, the construction seems fairly sturdy. I'm hopefully the internals are made as well as the outside and this unit lasts a while (it gets fairly regular use).If there's a minus at all, it's I don't care for the large transformer on the power chord. It's a little bulky and inconvenient but for my situation that's minor.

I've been using this for awhile with lots of different cell sizes and chemistries and I'm extremely pleased. Incredible value for the features it gives and it's a step above the majority of chargers currently on the market. It will accept the longest protected cells that you can buy (or make) and gives you full control over charging current in each slot, even allowing you to go full on 3A for each slot (most chargers that claim higher 2A or 3A current only allow you to use that on one or two slots, and the worst just continue to divide the max current by how many slots are in use...not this one). The "intelligence" here actually works very well, although some may wish to just enter a current manually and stick with a lower rate for some cells. I don't think this charger will harm any cells but the final current it chooses (based on metrics in the initial stages of cell insertion) can be a bit higher than what may be prudent for max cell lifetime cycles. This is handled smartly, however, so it may not affect cell life much or at all. Works great with NiMH and Li-ion, and will even accept "dead" ultra low voltage or very high resistance cells of both types without either refusing them or damaging them/risking meltdown. This surprised me but as I tested some "bad" cells the charger really did great. This doesn't mean it will fix bad cells of course, but it's a sign of good design and electronics, and it may give you some more use (limited) of old cells before you absolutely have to recycle them. The resistance readings seem to be consistent and people smarter than me have tested this charger and say that the readings are pretty accurate. Temperature reading is a great feature, too. If this charger had a discharge feature it would be just perfect, but you can get a good estimation of cell capacity just by noting the starting voltage and final input (and if you manually choose a 0.25C charge rate on a battery that you have run down to about 2.5 or 2.7 volts (depending on mfr spec) then you can pretty much spot on replicate the "real thing"). Lack of charging Li-poly may be a drawback for many these days. The only other slightly negative thing is that the power brick and cable connection is a bit bulky compared to most other chargers (but that does give you easy modular options if you need to run on 230V or travel to other countries, just swap the cord to mains). User interface is a little busy and blinky but easy enough to use and figure out. - using a single button for all control is a bit different if you're used to multi buttons. Nice strong backlight that turns off after a few minutes and comes on again at the press of a button. I think this charger would benefit from a "leg stand" for better viewing angle and greater airflow, but as is it does not get hot at all even with high capacity cells at high charging current. Thus far, minus the lack of a discharge function, this is my favorite charger I've used out of nine or ten of them over the years. Still keep the Maha C9000 but it sees little use now. If Powerex would make that one with the same features that would also do Li-ion it would be the perfect charger and so much less expensive than the Sky RC or Dragon.

This charger works exactly as advertised. It charges NiMh AAA, AA, C and D batteries at up to 1 amp. It also charges Li-ion 18650 batteries and other sizes of cylindrical Li-ion batteries at up to 3 amps. It tells you the internal resistance of the battery and shows the temperature of the battery as it's charging. You can mix different battery types and sizes and charge up to 4 of them at a time independently. They claim to reduce the charge current if the battery gets warmer than 60 degrees C but this would probably only happen if the battery is somewhat defective and has a high internal resistance. I've only observed temps of 38 C being reported so far because the unit does a good job of dissipating heat to keep temps down. Only ding against this is that it doesn't allow you to discharge batteries to determine their true capacity. Other chargers have that capability and they are almost lab equipment type chargers. But for basic charging of Ni-Mh and Li-ion batteries, this is an excellent smart charger!

I've been all through the manual, adjusted the settings, but it only goes to 1 amp, not 3 amps. The packaging says 3 amps, but it takes about 4 hours to charge my Energizer 2300's. Also, no good way to contact support. Waiting to hear back. Probably looking at a return.

Nice battery charger, but misleading description. It will not test the capacity of your battery. It says is has a 3A discharge, but it will not do a normal test of charging the battery, and then draining it to test the capacity. However, I do like how it measures the temperature and how the display has all in info so I don’t have to click through it one by one. Unfortunately, I wanted to know the true capacity of my batteries so I returned it and got a zanflare c4

I purchased this specifically for charging small 10440 (AAA sized) lithiums that require a ~250mA charge rate. It ended up working so well that I started using it for all of my other cells. It works great on 14500, 18650s, and 26650s. I do not have any lights that take a 21700 or 20700 so I couldnt test that size, but it does exactly what it specifies. Charges Lipos safely and terminates at a low enough current to get a full charge.

This is worth the money - I really like it. Really tells how good or bad my batteries are! that is how I rationalized the cost, in savings with reusing older batteries and determining which ones to get rid of. (i dont know "longevity? so I put 3 stars on that).

Only charger i would recommend for those who vape... All other chargers usually have a max charge of one amp=takes forever to charge... Ppl are so concerned about charging their batteries at past at 500ma -1000ma, i dont believe its a valid concern when you vape pulling 30-80watts from a single cell... Vaping is what actually kills batteries... Not a 3amp charge lol.... Said all that to say this, this charger is perfect! Thanx