By Jove I think I have found it! Got a reply from Michael at GVP and he said it wasn't a battery exactly but a single wire RTC with a battery inside. They were originally developed by Dallas Semiconductor
@1200 - It's amazing someone still exist from GVP. I was on their site a few months ago the physical address is located in Newtown, PA which is my home town in the US. GVP used to be located in King of Prussia, PA which was sometimes referred to as Greater Valley. I remember going there in the early 90's for a 4MB Memory module for my A530 Turbo. too cool!!
I found some info a while ago about the Battery Backed Clock in the A1230 from the fellow who archived the GVP products page.
Check it out
http://l8r.net/install/GVP/1230iigvpm.htmlA1230 Turbo+ Performance Series II Technical Specifications
CPU Type Mototola 68030 Processor
CPU Speed 68030 at 50MHz
FPU Type Motorola 68882 Math Coprocessor
FPU Speed 68882 at 50MHz
RAM Type GVP SIMM32 high-speed SIMM modules: 1MB, 4MB or 16MB sizes.
RAM Speed 60 nanosecond
RAM Wait States 0 wait states
RAM Capacity From 0MB to 32MB with current SIMM technology.
Battery Backed Clock Dallas DS1994 battery and clock in a single package (a.k.a. "Clock-In-A-Can") Battery Life 10 years
