Hum, makes sense! I thought that by simply adding another battery without a BMS directly to the VESC + and -, if it is within the same chemistry, would allow the boosted boards BMS to also control it. Having to open up the preexisting battery, remove the BMS (making sure not to fry it), then buying the same a123 cells, and putting everything into an enclosure seems way to much work!
in this scenario @walleywalker I wouldnt use the 2 6355 I mentioned, rather, just adapt onto a pre-existing boosted v1 board an extra battery pack.
I actually started this thread because I have a functioning boosted v1, but at max speed, I only manage 3.5 miles TOPS. I love the board, but ultimately, it is a waste of potential! I wanted to do something with it, so I thought of stripping it, or adding new motors/lion battery system, but all these ideas are very costly, and it would be cheaper to BUILD a board from scratch. I decided to find a way to add more cells to it, but, in a safe way! I saw one user adding 2 packs of 10s 18650, and he did a very thorough job with voltage regulations, even without a BMS. I am not experienced enough to even consider anything like this, I wanted something safe (ish), “easy”, and not THAT expensive. That’s why I thought of using a “old/used” boosted v2 SR battery, opening it up, taking out the BMS (or not, depending if it would work), and attaching it to the + and -, like the person did in this video. I know he explained very well about how mixing chems can be OK, and how he has been using his setup for 2 years, but on the safe side, I would mimic his plans with Lipo4 cells (I am assuming that even without a BMS, they would be SAFER-ish to use, considering at least there wouldn’t be mixing of chemistry, and they are safer in general).
the video I refer to is this one
and this one
The problem I am having is Location. I am in Brazil at the moment, and will remain here for the next year or so. Getting parts shipped here is a pain in the ass, especially battery cells. I cannot stress enough how hard it is, as an example, the “best” deal we can get here, on what we can assume are original samsung 30q is around 15 dollars per cell.
A friend has a SR v2 battery he said I can have for cheap, so I am trying to figure out a plan to use them.
Thank-you again for reading/responding to my post. As I mentioned, I am very inexperienced, But I have been reading as many posts as I can, even when most of the information I come across seems Alien to me. After about 3 months of constant reading, I am now understanding most of the basic concepts, like how I need 12s1p at least, to have the correct 39.6v using a123. Sorry if I said anything too incorrect, and thank you all for helping me, it has been really great!