Unless your local kart shop puts these batteries on their own karts, I’d be suspicious. Neither the battery to start an R/C plane, or the one to power the onboard electronics and servos, IMO won’t last on a kart. I’ve read the some people have good luck with cheapie batteries, but I haven’t. Bought three from a national battery retail shop and none of them lasted. Most of those types of batteries are for emergency lights. Think they were all 12v, 7.2 Ah. Purchased a 12v, 9Ah from Russell and never had another battery problem. The only caveat is the price. Russell is asking 88 bucks for the battery, but I think it’s worth it.
LAD Specialties / tony kart / rotax / kt100