Are we waiting for the Sweed to come back and respond to these posts? Did he forget?
I was looking at phone batteries today. I don't like them. I saw another post around here somewhere. The guy said that he fried his battery because he went with a Lithium battery and forgot to disable charging on his A3000. Well I gotta tell you that I like the lithium idea better than the NiCad and most Phone batteries are NiCad and they suck. The Lithium Barrell would be the easiest route.
Coin battery is the best in my opinion. Take an old 486-P4 motherboard or a dead 4000T and a blow torch. Torch the underside of where the coin battery socket is and pry it with a toothpic or wooden tapered embossing pin (I usually just pull on it with my fingers but some folk are squeemish). DON'T USE THE BLOWTORCH ON THE GOOD MOTHERBOARD. It can be a little smelly too so you need to do this outside. The Coin battery socket has two pins instead of three but thats good. Make sure of orientation when placing the new socket in place of the old barrell battery holes. You only need to use one of the holes on the negative side and the lone hole for the positive side of the socket. (I think I've got that right from memory). Now just dab some solder on the underside of the PCB where the new socket pins come through and your done.
Ok, I don't know about the recharging thing. You don't want a charge on this new coin battery. If anyone can add info on that, I'm sure it will be usefull information. Without a A3000 board in front of me, It would be dificult for me to trace it. I would assume you need to clip or desolder a transisitor somewhere but there may actually be a jumper.