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Right - parallel cell groups. Thanks for the battery 101 lesson by the way :D So, measurements are in: 1.6V - Group 1 ~ 1.6V 3.14V - Group 2 ~ 1.54V 4.65V - Group 3 ~ 1.51V 6.25V - Group 4 ~ 1.6V 7.91V - Group 5 ~ 1.66V 9.55V - Group 6 ~ 1.64V 11.22V - Group 7 ~ 1.67V So, max difference of ~0.16V

Thanks vfr. Seems I'm out of luck, 11V no matter where I measure. Do you mind if I know how you calculated this? 20v @ 21 cells ~~ 1V/cell? Given this, I'm likely going to replace the cells in this pack myself. I'm having a hell of a time opening it to begin with, hopefully I manage to get it...

Thank you all so much for the prompt replies! I'll be posting more photos and measurements today after work. You're correct, I was only measuring from the terminals of the batteries, before the BMS (just to see if there was any life in the cells at all). I'll re-measure with the fuse replaced &...

Hi There, I've managed to get my hands on a Japanese Sanyo Eneloop hybrid here in London. Used, and no idea if the battery works. Unfortunately it didn't come with a charger. Given that its Japanese, finding a charger locally is coming up dry. To add to that, the factory unit is 110V only, so...

Hey! Yep, didn't go in that direction. So, in the end I decided to go half project, half off the shelf. I bought a used imported Japanses "Sanyo Eneloop" from someone nearby. The bike is in good shape, but the seller had no idea on the state of the electronics. Took it home and opened up the...

Thanks for all the encouragement and advice. Anything I should avoid specifically on the donor bike? Wheel size, gear ratios, etc? We are thinking of a donor like this:

Hi Folks, I’m new here. I’m an engineer from Canada who recently moved to London with my Partner. We bought two electric bikes (second hand) last year. We live in the Docklands in London. I’ve got a Carrera Vengance E, and my partner has a smaller 20” “white bear” e bike. We both love the E...