[Andy A.]

I belive you may have more then just a bad battery here.

When was the last time you charged the 7.2v battery? Are you completely absoultly sure that it was charged during this?

It's acutally pretty easy to kill that battery. If you just powerup the bot with out ever establishing a link to the OI it will just sit and listen till it kills the battery or someone presses reset. I also noticed that the connector on the RC and battery are kinda cheesy. Perhaps it has come loose?

As for the battery 'pulseing' power, I would very carefully check the breakers. It sounds like there may be a short on either your RC circuit that is causing that breaker to trip. Did you hear any ticking noises? Perhaps the RC has an internal fault.

Before you toss a battery, eliminate all other possibiltys. Batterys not be cheap.

-Andy A.