HP-71B battery drain with no extra RAM or ROM

[Paul Berger (Canada)]

(12-12-2015 05:02 PM)hpcalcuser83 Wrote:  Thanks. I will review the service manual and decide if I want to undertake this task.

-Gil

The positive and negative terminals are a u shaped piece of metal on the end of a wire attached to the memory and I/O board they clip over the end of the battery box from underneath, I think it would be pretty hard for one to completely fall out, and it could not easily be pushed down, the battery box is almost touching the keyboard PCB, the only thing left would be if it snapped in half where it is bent, in which case the part iside the battery box would be easily lost and the other half with the wire attached would be behind the wall of the battery box. If you nee a replacement send me a PM I have a parts machine with both of those contacts intact.

Paul.