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Hi sorry for late reply I have been away. 1. 4.15 2. 4.15 3. 4.14 4. 4.15 5. 4.13 6. 4.13 7. 4.13 8. 4.13 9. 4.14 10. 4.15 11. 4.14 12. 4.15 13. 4.14 14. 4.15 And total output was 52.5v

Hi sorry for late reply I have been away. I charged everything individually like you said then connected BMS back on and charged for a few hours and new readings are now : 1. 4.15 2. 4.15 3. 4.14 4. 4.15 5. 4.13 6. 4.13 7. 4.13 8. 4.13 9. 4.14 10. 4.15 11. 4.14 12. 4.15 13. 4.14 14. 4.15 And...

Oh sorry I misunderstood. I just try with a second multimeter and the readings are the same.

Oops I just finished charging the first one to 4.16 at 1ah, I'll turn it down to 0.5 for the rest.

That's what I thought tbh i don't understand why I'm only getting 52.2v when all cells add up to.more individually. What could be the reason for that? Faulty BMS? I don't have another battery to test unfortunately.

That's all I can see on the cells.

Thanks so much for this information I think I have a Thanks so much for this information I think I have a charger that can do this. I will be back with updates.

Hi mate yeah I just done that now thanks taken my readings from the white block. No Arc this time. My readings posted above thanks. I followed this video to test first time

1. 4.17 2. 4.17 3. 4.11 4. 4.17 5. 4.16 6. 4.16 7. 4.14 8. 4.13 9. 4.10 10. 4.17 11. 4.10 12. 4.17 13. 4.16 14. 4.17

Charger is reading at 58.6v. Before I took pack apart yesterday battery was 57v now only 52.2

Hi I just checked all voltages again on the BMS and they are all 4.1 to 4.17. So I tested 14 X 4.1 is at least 56v. So does this possibly mean BMS is faulty? Not sending out correct voltage?

When checking the voltages I did arc when using the multimeter on the BMS.

Hi I stuck the pack back together I'll have to cut it open again. I just tested the battery now it's only 52.2v but while on charge 58.3. Does this mean IV damages some cells while having it open?

AHH I see thanks mate I see now

I have no idea mate as know hardly anything about electrics but there is a few scooters on the market with specs like mine. I can try tomorrow. Main controller must be plugged in second controller is plugged into main controller.

I see I just be looking at it all wrong cause I can only see 7 groups of 18 batteries.e

I have actually already replaced one of the controllers. I think the battery is okay. I have tested using this method and they all came back as 4.1v. Does this mean BMS and battery okay? Maybe controllers ar broken.

Yes motors have got hot before. Yes 2 controllers one throttle. I have ridden scooter In the rain but not sure of water damage. I did try to seal off everything with sealant. I'll have a look tomorrow when I go into garage but they could be. You think it could be motors ?

This is my scooter https://www.ebay.co.uk/itm/324289020792

Sorry I'm new to this it looks like there 7 sets of 18 battery's? I have checked the voltages on the BMS and they are all 4.1. Yes I will try again tomorrow and reply back, thank you.