Need specs for IBM PC Convertible power supply

Yes My convertible has the power supply(AC adapter) The DC output is 15V at 2.7 Amps. The I'm not sure of the size of the power connector but it's the common black tipped barrel variety I also have an unopened IBM battery which I think is for the same machine (It came in the same IBM case) #6820790 bar code on the box. I've never opened the convertible case to see it's the same battery! On the Battery itself it says P/N2684331 The good news if that is indeed a battery for the machine is that its rated at 9.6V at 1.8 Amp/Hr and it appears it connects by a simple 2 wires to the computer. I think the battery may be too small to actually power the laptop (although its big) but rather to keep a power state to the computer. I think it actually stores basic in a static ram. I think if you look through a lot of HP printer adapters, you may find one that close. Cheers Tom Vintage Computer Festival wrote: