First post, by c0keb0ttle
My 486 motherboard had a soldered on rechargable 3.6V battery, but it was removed so it wouldn't leak. I was adviced on this board to mount an external battery if possible, and it looks like it is possible. However, I'm a bit confused and need some more advice.
My board is very close to this one:
https://th99.bl4ckb0x.de/m/C-D/34280.htm
It's not 100% identical as some jumpers are placed differently, but it seems to be close enough.
The J6 is the connector for an external battery.
It looks like only pin 1 is connected to anything. Am I correct in assuming this should be soldered to the plus side of a battery holder? Shouldn't the minus side be connected to anything?
On the back of the board nothing except the soldering blobs are visible.