Hello all, I recently acquired a Compaq Armada 7400, and upon the usual inspection, I came across a leaking 7.2v 60mah nimh battery, which I pulled out and noticed no damage to the board. However, I have been having the hardest time finding a replacement for it online that isn't an insane price.

So I have a couple of questions, first, are there any suitable substitutes out there currently for it that use the same 2 pin connector head? The part numbers are 220807-001 or 220351-001 and I am attaching photos of the battery itself.

Secondly, what is the auxiliary battery even used for? Because this laptop also comes with a 3v CR1632 RTC battery, and the bios is stored on the HDD partition so I honestly don't know what the function of the auxiliary battery is, and I have been wondering about leaving it out altogether too since it booted up without it.

I apologise if it sounds like a bit much, I have been researching for hours for a suitable replacement and have come up with more questions than answers so I would appreciate any help I can get.