I just got a free old laptop, which is good except for teh CMOS battery. It currently has a Sanyo ML1220, but they're hard to find especially ones without pins soldered to them. So can I just use any ML1220 (Varta etc.)? I notice there are slight differences in spec, say 17mAh vs 15mAh nominal capacity.
michaelt: Also, apparently the ML1220 is rechargeable, although I'm not sure I'd try it.
What do you mean? CMOS batteries are supposed to be rechargeable. The one in question just has diminished capacity to hold it's charge, hence my question.
michaelt: Also, apparently the ML1220 is rechargeable, although I'm not sure I'd try it.
What do you mean? CMOS batteries are supposed to be rechargeable. The one in question just has diminished capacity to hold it's charge, hence my question.
In laptops CMOS batteruies are often rechargeable. In desktop PC's they're typically just CR2032's which are not.
sbiddle: In laptops CMOS batteruies are often rechargeable. In desktop PC's they're typically just CR2032's which are not.
It seems you're right about the desktop batteries, but that's news to me. I always assumed that they were all rechargeable, and I don't see how they can hold enough charge to power the CMOS for years.
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