HP27 Restoration (Lots of Corrosion)

[mfleming]

(05-16-2022 05:52 PM)calc-calcs Wrote:  Two new Eneloop cells and temporarily close the pack up with a couple of strips of magic tape on the sides. So far it seems to be working just fine, no contact issues with the springs so far.

Just an idea to consider. I'm in the process of replacing the Eneloop batteries in my Woodstock battery holders with 4/5 AA NiMH cells. Their capacity is lower, 1300 vs. 1900 mAh, but full size AA cells tend to squeeze the holder spings flat and make the holder difficult to remove. Due to the shorter cell length you need to shim the springs forward a bit so the battery surfaces at the other end make firm contact with the PCB terminals. The batteries are flat tops so there's plenty of surface making contact with springs and terminals. The battery switchover puts less stress on calculator and holder.

~Mark