I have a Latrax Prerunner which works great with thr stock battery (latrax 1200mAh 7.2) and I use the stock charger (6 cell nimh wall charger).

I bought a Venom (1600mAh 7.2). I charged it fully. Tried it on the car and it ran for about 10 seconds. Took it to the hobby shop and they said it might have something to do with the voltage (total newbie here). They charged it for like 10 min with their charger, put it my car and it worked. They said I should buy a better charger. Does that sound right? When I got home I tried again and car didn't work anymore...