Backpack sized off-roader?

So, got the truck this morning, perfect little thing, great size! However, I got the Traxxas battery and charged it at 1A for about 40 minutes and I was somewhat unimpressed with the power of the truck. Perhaps the burn-in of the motor is the problem, but I tried to charge the battery and the charge light flashed, usually it glows. So I'm thinking there's a problem with the battery... I charged another pack and the performance seemed the same, just seemed like the acceleration wasn't as good as what I'd expected from watching videos of other stock ones. Could be my slipper set quite loose...

Are the standard battery packs really that bad?