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Just to say the bms arrived and is now fitted and works a dream! I have discharged and recharged and the balancing is better than I expected, well with in 0.2v of each other, most 0.1v The switch wire was not needed so I just joined the two ends together. Thanks for all your advice and patience.

Thanks for your help. I have ordered a 13s Be Much Safer BMS with switch. Even though my silverfish battery has a key to lock and power the bike, I’m guessing that I may not need the wire from the bms. I will just need to join the ends together to bridge it? (It looks a small enough wire not...

Sorry but your more confident than me. I only have about an inch of ribbon to get to. I cant get the cell pack out as its stuck in there with thick foam strips and silicon. Cutting live wires with sissors might cause more probs, and i'm sure your not suggesting that. I did find a useful youtube...

Thanks I think I will go with this one without switch but with balancing. https://www.aliexpress.com/item/1005004820133678.html To tide me over I ordered a daly from Amazon , https://www.amazon.co.uk/dp/B0D114YHVR?ref=ppx_yo2ov_dt_b_fed_asin_title I went to fit it this morning and as I was...

Sorry I thought maybe ‘with switch’ (third one along,) was for turning balance function on or off. So maybe this one...

I’ve also seen this that is 2 wire ‘common port’...

Thanks I’ve looked at the BeMuchSafer 13S 35A 30A 48V Battery BMS, just to clarify, does the ‘switch’ operate the balance function...

As regards the Ali listing, we searched for a long time trying to sort what did not sound right, and only chose this one because of the communications that we had. There are many multiple listings on Ali that look similar, and if there are any genuine e-bike batteries on there they are buried...

Thanks, just tried and at the moment the silverfish style 48v 20ah is out of stock but looks promising. I’ve signed up and will keep trying, Thanks again.

Ok, I know what you mean, I’ll look into doing that instead. Thanks for all your help.

Thanks, that sounds like what I am looking for, maybe at least 20ah. Just had a Quick Look, do you think the packs inside would be interchangeable with my silverfish style so I could swap them over? As long as they send me the right one that is…….

Thank for your reply. By what you’ve said the Daly’s sounds that they could be untrustworthy and a bit problematic. Almost sounds like the balancing feature didn’t stop or something. I thought I’d try a more expensive type as the cheaper ones seem to be nondescript, and I do like the balancing...

I have noticed that the price do change a lot as well. I thought we would give it a try as I can’t seem to get any locally. Do you mind saying where you managed to find a good one? We use them so much around here I don’t mind paying a bit more. Maybe even replacing the pack inside? Building...

No problem I have changed as suggested. I actually bought two of these, https://www.aliexpress.com/item/1005007221470572.html?spm=a2g0o.order_list.order_list_main.28.a1771802RQBepe We live in north wales in Snowdonia very hilly and mountainous. So to go out for the day with a 10-15ah doesn‘t...

Just to clarify... have you bought a battery on Aliexpress from PSW? I have never seen 48V 30Ah battery in their offer. No sorry not PSW, I regret leaving the comment as it was off topic. Just Ignore me…..

Sorry your right, it was just the mention of Aliexpress and the problems we seem to have getting refunds when things go wrong.

Even though I didn't buy battery from PSW I have just gone through the rigmarole of having to use PayPal for a Ali-express ‘original Samsung 30ah 48v battery‘ that after being delivered in a plan brown box, turn out to be a ‘who knows 16ah‘ after testing. At least it was 48v. Paypal made me jump...

Just one more thing, (Columbo, fan,) Is there a particular order to connect the wire to a BMS or doesn’t it matter?

Here’s a couple of photos showing the actual non-description bms. Full disclosure, I was trying to use a 4amp charger from another bike instead of the 2amp that came with it. I had to change the socket from a dc power type to a XLR so cutting of and re soldering them. Both had a blue and brown...

Great! Thanks so much, forgot to mention that in the housing there is a fuse a charger socket and a type of useless 4 stage led for capacity info. Thanks again.