[quote=jon_slider]
That’s an interesting device. Do you use it in the USB port and plug the charger in to it? What’s it called? Thanks.
I only have one complaint with the Olight UC charger though. When I charge my nimhs often it won’t charge. I guess the voltage might be way too low but haven’t really tested it. Just made a habit to charge my battery every month.
correct, googling USB Voltmeter finds some
here is one
sorry to hear, wonder why?
works fine for my eneloops, that is one of the main reasons I use it, as my primary chargers. I can charge an Eneloop, and I can also charge a LiIon… that covers all my needs.
Not sure. I just assume that my mouse drains it too much and the charger can’t sense the voltage that it’s a nimh? Works fine when I charge it before it warns me that it’s low. Still happy with it though bring it with me all the time.
If the cells are aged (prematurely or from lots of cycles) the charger may sense high resistance and just refuse to go. Most "smart" chargers will do this and for those cells you'll have to go back to a dumb charger that doesn't care.
The USB test meters often are not very accurate but it depends. I have one that tests extremely accurate against a good bench supply (the RD AT35) which was a surprise. Hooked it in to the Olight charger on several batteries the other day and I get the full range of current input. On Vapcell gold 14500 1000mAh cells from 2.8v it starts slow and stays around 300mA for a bit before ramping up to a somewhat steady 550mA although on one of those cells there was a brief peak of 700mA for maybe 30 seconds. On the Vapcell H10 14500 it peaked at 770mA, spent most of the time at 700mA until tapering down gradually as it reached full charge. A 35E cell (fairly new) stayed around 700mA and then awhile at 630mA before tapering down. Also a Nitecore 14500 800mA micro usb onboard charging cell and it peaked at 550mA but quickly dropped to 500mA and spent most of it's time around 380mA (that cell has seen a lot of cycles and probably started the charge at 3v, forgot to check it). Interesting to watch the charger with different cells. Certainly does get up near the top of its stated charge rate, some times, some cells. I wonder just how smart the circuitry is, really tiny package but it's doing a lot of things. I tested it total of about nine times, used a usb 2 port on a desktop (which did not deliver full voltage, but the charger doesn't seem to mind that), a 2a wall wart, and a 1a wall wart. The usb 2 actually gave 600mA which was a surprise...same cells on the other sources got more juice of course, at least for a little while. I'll try some VTC6 and 50E and see if it will try to give the whole 850mA current or not, and some well used VTC4 for kicks.
Cells are pretty new just a little bit over a year. Not sure if I just got a lemon. Cells are still useful though. Just thought to share my experience with it.