Wait can you add a button if you use a bms? how? I suspect it won’t work if you use a bms only for charging, but how does it work
sorry but i can’t answer this question 
God this build seems like a bad idea the guy’s planing to use a hobby charger and use it in the rain. I your set on this setup get a parallel charger for you hobby charger at-least
Are you Dumb? I said it rains a lot as in i cant ride everday.
And i rather not spend another 15 bucks on Parallel charger i want to switch to LI-On in 6 months.
Ok thats great.