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The cell was still at 4.18 today so i have fitted a small 2pin connector to bring that cell connections outside the battery case and have made a simple test plug with two leds to simply plug in and indicate if nearer to 3.6 or 4.1. I took the bike out for a short ride up a hill where it cut out...

Thanks for all the advice I don't know if it is classed as first it is possibly the last at the most positive of the battery. I have started to recharge it individually and the voltage has risen from 3.6 to 3.99 on constant current, I will switch to a constant voltage shortly and see if current...

It looks like i will have to buy a complete new battery in the end so i may try Franks suggestion of charging the first cell (it is first) on its own, i have nothing to lose. I checked the state of the cells using the 11way connector coming out of the shrink wrapped pack as i presumed this was...

Thankyou flecc I did not realise there would be a difference in the packs i assumed the packs would be very similar characteristics even from different sources

I have a Wisper 905se but now has limited range, one cell in the 36V 14 AH Li-ion battery stays at 3.6v while the other 9 cells charge up to 4.2v. Has anyone replaced a single cell in this type of battery or where can individual cells be purchased. Alternatively can a new block of 10 cells be...