Was going to suggest, even easier to find would be to use the link in your signature, www.amazon.com/shops/miboxer , to get to the storefront, and the charger’s right there up-top.
HKJ our resident charger tester and expert didn’t have a lot of good things to say about it but did say it was “acceptable”. He said with some cells if you don’t take them out when the charging cycle is complete, it will continue to charge and could damage the cell.
Anyway, with leomilboxer’s discount and a discount coupon I had for Amazon, for a total cost of $4.00, I couldn’t pass it up!
I don’t leave cells unattended, at least not too long, so for me that’s not an issue. In fact, unless proven otherwise, I assume they do exactly that anyway.
Cell gets topped off, current stops, cell “rests”, voltage drops, charger tops off again. Rinse, repeat.
That was the first version of the C4. The versions that now sell on Amazon don’t have the termination problem. I think Leo sent HKJ the newer version as well. I got one from Leo, and it terminates fine. HKJ needs to update that review.
That’s funny! At first I didn’t get it but when I received the charger, there it was, right on the front of the box. I wonder if it’s also a “holy” charger?
Okay, here comes the dumb question. The instructions state that the charger automatically senses whatever cell you insert into it and adjusts the charge current accordingly to the cell’s size or chemistry.
Why then does it have adjustments for cell capacity and charging current? Just asking.
So that you can override it when it makes a dumb decision, which it will do on occasion. I put a 700mAh LiFePO4 in mine and it decided to start charging it at 800mAh. It might have stepped down by itself shortly but I didn’t want to take a chance on harming the battery, so I forced it down to 300mAh.
It also allows you to increase the charge rate (within reason) it you’re in a hurry and and are willing to possibly accept a slight decrease in battery longevity. I normally don’t like to see a Li-Ion charger go above .5C, but will push some to 1C if I’m in a hurry and they can handle it.
LFP (“600mAH”, tested at a paltry 480-490mAH) started charging at 800mA. Sez me, “That can’t be good…”, so knocked it down to 100mA (no rush). That’d be charging at almost 2C if I left it.
Yeah, might’ve adjusted itself after a while, but wasn’t going to chance it.
Looks like the adjustments are mainly for LFP cells which I don’t have any.
I prefer to slow charge my cells but I guess it’s nice to be able to fast charge them if desired.
I charged some old, original eneloop AA cells that weren’t holding their charges very well and wouldn’t charge up to full capacity with other chargers. This one charged them up to full capacity but we’ll see how they hold their charge.