How to test T61 backup battery?

Hello,
am taking apart a T61 for cleaning, OS reload etc and am thinking of testing the backup battery while I am in the maintenance mode. The maintenance manual indicates to remove the battery and measure the voltage, but doesn't indicate how to do this, I have a multimeter but have no idea how to test this particular part.
Any suggestions welcome.
Thanks!
T400 6475-8Q5 | 8GB RAM | WXGA+ | Seagate 500GB 7200 | Win 7 Pro 64-bit............T61 7658-CTR | 8GB RAM | WD Black 320GB
Solved!
Go to Solution.

it's a simple DC battery with two wires, you just check the voltage across them, but I'd recommend you remove any bios passwords you may have set first.
Also, these batteries don't often go bad, so you can simply remove the main battery and unplug the AC for a few hours and if the clock remains set, the cmos battery is working.
ThinkPad W-510 i7-820QM(1.73-3.06GHz) Quad Core... ThinkPad T500, T9900, 8gb SSD...FrankNpad T-60p/61p (X9000 2.8ghz) 8gb SSD ips FlexView...ThinkPad T-61p (T9300 2.5ghz) 8gb ram...Thinkpad X-61 Tablet 4gb ram...ThinkPad A-31 (1.9ghz P4 1.5gb ram)

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** Say thanks by clicking the "Thumb up" icon which is on the left. **
** Make it easier for other people to find solutions, by marking my answer with "Accept as Solution" if it solves your issue. **

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