Risc PC, A7000 and A7000+
CMOS rechargeable battery replacement
NiCad AAA Rechargeable Battery - 300mAh
Battery holder with spacers attached
Due to the original type of CMOS battery no longer being manufactured and only a few retailers selling residual stock, I have tried the following battery replacement which works well for me and is cheap to install.
Battery holder fixed inside Risc PC case
AAA battery and holder wired in to the
Risc PC (left) and A7000+ (right) motherboard
where the original battery has been removed.
Positive and negative CMOS battery power cables soldered into the (A7000+) motherboard
Parts required
- GP30AAAKC NiCad AAA Rechargeable Battery - 300mAh - 1.2 volt - Cost: £1.16
- I am also told the following Ni-MH batteries would be fine:
BT00638 Ni-MH Rechargeable Battery - 600mAh - 1.2 volt - Cost: £1.16 - Web
BT02215 Ni-MH Rechargeable Battery - 650mAh - 1.2 volt - Cost: £1.15 - Web
- BX0034 Battery Holder - 1x AAA - Cost: £1.09 - Web
- Cable, sleeving and 2x Spacers with screws - Cost: £0.14
Charging
I understand that the time needed to initially fully charge a 600mAh cell in a Risc PC would be 75+ hours.
This battery arrangement works fine for me but I cannot be held responsible for any problems you might have with it.
Cost of the above was what it cost when I looked up the price!
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Revised: 15 May 2010
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