About T500 battery issue

[happiestboy]

I bought a T500 in Jan, 2009. So far my battery only has 53 cycles. But it only could last at most 20min. Sometimes, the gauge shows 60% full, but the next minute it shows less than 1% full and shut down automatically. Although I bought a 3-year warranty for my T500, the representative said the warranty for battery is only one year... And I found I need to spend more than $150 for a new battery...

The manufacturer is Sony and FRU number is  42T4623. It is a Li-Ion battery and the gauge still says this battery is in good condition. What's the problem with battery? Do I have to buy a new one?

Thanks for any advice.

Hao

[lead_org Microsoft MVP Contributor]

you have couple of dead battery cells in the battery pack. 

[happiestboy]

Thanks, but do I have to buy a new battery back, i.e. 6 cell or 9 cell?

[lead_org Microsoft MVP Contributor]

6 cell or 9 cell should all be fine. If you are getting a new battery, you maybe interested in reading this post.

http://forum.thinkpads.com/viewtopic.php?p=540193

Boston Battery mentioned in the post has 3 years warranty and is only around 70 USD. 

[happiestboy]

Thanks very much! I need to check whether they have batteries fit for T500 15.4'

[happiestboy]

do you think this link is good for T500 15.4"?

http://www.laptopcharge.com/category/notebook+battery/ibm/thinkpad+t500/lib200-gs.aspx#pt

From power manager, I got my battery FRU# is 42T4623 but from Lenovo website warranty page, I got my battery FRU# is 42T4777, MFG# is 92P1142. It's very weird.

From the above link, I found it's compatible with 92P1142, but did not find 42T4623 or 42T4777 in the compatibility list as below:

40Y6796	40Y6797	40Y6798
40Y6799	41N5666	42T4566
92P1127	92P1130	92P1131
92P1132	92P1133	92P1134
92P1137	92P1138	92P1139
92P1140	92P1141	92P1142