Can you tell me what is says next to each lead like in this picture? If so I might be able to help you.
That's a pretty popular voltmeter here on BLF. First pin is (-), 2nd pin is (+), it can connect & measure up to 6 batteries in series.
Here's some BLF pictures of that LiPo 1s-6s Voltmeter installation:
on the xtar MP1: https://budgetlightforum.com/t/-/7566
and on the ML-102: https://budgetlightforum.com/t/-/5219
Steve_the_chief's detailed pictures of voltmeter connection on MP1: https://budgetlightforum.com/t/-/5973
Which of the available (two-wire) 0V-9.99V displays has the lowest power requirements for the display ? … The lower the better as it will be interfering slightly with the charging current … Which of the (two-wire) displays have an accuracy adjustment ? … Some of the three-wire displays have an adjustment potentiometer , but they need a supply voltage (on the red and black leads) and the other green or white measurement lead (+) needs to be used with the supply -ve lead … This is not really practical as I don’t want to attatch a separate 6V isolated supply to the display.
I would consider mounting these on my cheapy charger board chargers , but with a push-button or switch to turn on the display … A LCD display would possibly be better than a LED display as it would use less current … Are any available ? … Any four digit displays (0V-9.999V) available ?
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I dont know, my is not working than.
I removed plastic wrapping from it (I dont know why), maybe I damaged it in the process
Does it need some additonal source of power, or you simply connect battery to it?
Hmm, sorry, its working now, and it seems its completely accurate.
I just measured 4,20V on cell charged on Sysmax Nitecore 4-bay charger.
YOu can buy cheap universal table charger from ebay or banggood and modify it with this little thingy to voltage checker for all sizes of Li-ion cells.
I really dont know why they dont make chargers with this.
They would be a hit