I've had my G-Boom for 2 years now, and my battery is getting weaker and weaker. I'm eventually going to have to replace the battery. I believe it would be cheaper to replace the old battery myself than to buy a new G-Boom box. Luckily I'm a electronics engineer. Before I take the G-Boom box apart, will you tell me the size and type part the boom box takes, and other than Radio Shack, are there any other businesses that sell that particular rechargeable battery or one that compatible with the boom box?