So I have a motorcycle (2007 Suzuki Boulevard S40, 650cc single cylinder engine) which I’ve modified into a cafe racer style bike, and one of the mods I made was to not only replace the bikes heavy ass lead acid battery with an incredibly small and light LiFePO4 with built in BMS, but I also fabricated a small space to hide it. Currently though, I need to get a new one, but I figured it would be possible for me to make it myself, and use Li-on 18650 or maybe the newer 21700 sized cells, instead of the A123 26650 LiFePO4 cells to save further space, and probably save some money as well.
So I was hoping someone on the forum here might have suggestions on the cells I should use and in which configuration, so that it will either meet, or exceed the power of the original battery I was using; an EarthX ETX18B.
I haven’t opened the battery up, but I think it’s a 4s3p, but I’m not 100%sure on that… I do know it uses the A123 26650 cells, so with the new 21700 cells now available, I was thinking I could use the new Samsung 30T or 40T in the same configuration and hopefully end up with a more powerful, yet smaller and lighter battery this way. It also has a built in BMS, so suggestions on which of those might be a good choice would also be helpful. I don’t imagine I could salvage that from the battery I’m replacing (or could I?).
Lastly, I think I should mention that the battery I have, and was using apperantly was not the recommended one according to the sales people. I was using the battery that’s a size smaller, I think by one less parallel group. It was the ETX12A, which I’m almost positive was a 4s2p. It never really gave me any problems, but it did not last as long as it should have, so that’s probably why I need the larger size with the extra P group. Here a pic of that batteries stats along with link.
As always, any help would be greatly appreciated! Thank you!