Got my son an HPISpring 2 Sport RTRDrift 350z. Seems like a lotta fun so far. Spending the money on the car, I had to go cheap on the batteries and charger. Hey, I'm a noob, whadya want.

So yeah, we purchased whatever Radio Shack had pre-Xmas:
7.2V2000mAh Ni-Cd batt & chrgr combo.
http://www.radioshack.com/product/in...ductId=2062121

Then went back to RS to get this:
7.2V3200mAh Ni-MH batt
http://www.radioshack.com/product/in...ductId=2147160

Key questions are, how long should these batteries be charged for and how long should they be good for, given maximum usage. We're getting about 45 mins from the Ni-MH after charging for some time. Is it okay to charge overnight? The charger has no indicator to say when it's charged, so how do we know, aside from trial and error.

Looks like this is the place for answers. Hope to hear back.