If the 8700c required 750maH then it would not be able to charge off of the USB ports on computers because computer USB ports are only 500maH.
My guess is, that there might be some sort of weird charging mechinisim that charges the battery all the way, and then turns off charging, and then when the battery is run down a little it'll recharge again. That would explain why the charge symbol was going on and off.
But that would be a strange way to charge a battery.
He's not any kind of program, Sark. He's a user!