MiBOXER Rechargeable Battery Charger 8 Bay LCD Display AA Battery Charger for 3.7V 4.2V 4.35V LiFePO4 RCR123 Ni-MH Ni-Cd A AA C

Great charger, can detect most of the batteries and automatically adjusts the charging current and voltage. You can also override these values and set your own ones, which is very convenient. There are couple battery types that it cannot detect and it's written in the manual. Just curious who reads the manuals nowadays! :) But if the V/A are incorrectly set for these undetectable types, the batteries can explode and cause fire. So people, be careful. It's not critical for me although, I'm not using these types. What critical is - this charger cannot test the batteries and, keeping in mind all its other features, I consider that as a big disadvantage or gap. I had to purchase another charger today to test about 40-50 rechargeable batteries from my closet to through mostly all of them away and keep tracking the new sets of batteries. If this 8 slot one could do that it would be priceless! But... I had to keep both and the charger/tester is only 4 slot wide and it's slow for my needs. What else I have noticed so far - it doesn't show the real capacity of the charged battery as promised, rather how much it did charge it, so if you charge almost from zero, means almost discharged battery, it will show something pretty close to real, but if not... you are out of luck. Another disadvantage - if you touch a battery or move the charger pretty fast, it can lose the status of the currently charging batteries, because the contacts, holding the batteries are very delicate, not weak, but easy to disconnect. I've done that twice and got all my battery capacities zeroed. But I can live with that since it correctly detects the end of the charging process and usually correctly charges all batteries full.Update a week later: the company has a very impressive support! I was contacted via email and we discussed a few features and suggestions that I was able to make and they were transferred to the engineer for the further improvement. I said I am missing a test/discharge capability and got a promise that it will be added. The situation when the charger loses the battery info if it's disconnected for a part of second, say, if you move a device or touch the battery, will hopefully be addressed in the future releases. I got a discount code to get and test another charger made by this company having discharge/test capability. Nice work, guys! Keep it this way and you will be unbeatable!

Executive summary:Well designed and built charger for small cells. Highly recommended!Background:Because I'm a photographer and use portable electronic flash guns that place high demands on batteries, I bought in to rechargeable battery technologies as soon as they were available and upgraded with each new improvement.The first 'smart' charger I acquired was a LaCrosse BC-900. It was far superior to the Radio Shack/EverReady/etc. 'dumb' chargers that simply ran current through the cells. It performed well for a number of years but as I shot less, I noticed the batteries faded faster and put it down to their age. I stopped shooting altogether during a long family health crisis. When I returned, I had to determine which batteries were worth keeping. Inexplicably, a number of them would report 3.7mAh when fully charged but died as soon as they were put into cameras and flash units. LaCrosse could not explain why. I ended up with a big bag of batteries to recycle.It finally occurred to me that the *charger* might the problem -- duh!The MiBoxer 18650 arrived and I simply pulled set after set of batteries from the recycle bag, loaded them into the charger and let it determine what to do. Then I popped them into flash units and voila! They still worked! And after a few cycles, they got better! Of course they are not 'like new' but that expectation would be unreasonable. It essentially rescued a lot of batteries from a landfill and probably paid for itself in the money I saved by not having to replace them.Though I don't necessarily have to, I'm going to buy some new batteries -- low discharge because those have performed the best of my older ones -- and see how much better those are when charged by the MiBoxer.One final note; being able to charge 8 cells at a time vs. 4 is significantly more convenient.

I got my first MiBoxer charger a couple of years ago. I ended up getting a 2-slot and a 4-slot unit. They have proven to work well, and I trust them.The C8 got my attention recently because of the ability to charge up to 8 batteries at once. Anyway, in the brief time that I've owned it, I can see that it offers the same level of quality that the previous versions do.The features the C8 has, are not unlike other similar chargers. Once a battery is placed in a bay, it'll automatically select the current based on the type of battery it is. Even though I find this to be the best way to charge, you can still select the current of your choice from the levels offered, based on whether it's a lithium or NiMH battery. One thing to understand about chargers though, is that regardless of what level you might WANT to charge with, the charger WILL ultimately adjust that level automatically....especially as the battery reaches full capacity. Just keep that in mind.Other than that, it charges just about any type of rechargeable battery. The slots can accommodate all sizes from 16340, up to 21700 and 26650 without cramping the style of the neighboring cell. During the charge, the "vitals" of the battery are constantly displayed.... Percentage of current capacity... Charging voltage... Internal resistance automatically toggles with the Charging Current... Amount of mAh accepted by the battery toggles with total charging time when finishedIt's with the features I just explained plus a whole slew of safety attributes, that I recommend the MiBoxer C8.

The thing I like best about this charger is that it shows internal resistance. I have a mix of batteries that are new, 2, and 5 years old. Using the internal resistance I can determine which of these batteries can still be used in digital equipment and which are only good for analog. The ability to set the charging amperage for faster or slower charging really either helps in a pinch or allows batteries to be topped off.