Low cost perfect preformer
I purchased this battery to replace a toasted T41 battery. I am surprised at the life I get out of my T41 running Ubuntu 9.04.

With other laptops I usually keep my power supply close by for when my battery dies abruptly (i.e. it says 10 minutes and the next moment "I am shutting down messages").

This battery has been running great. I have not had the sudden power drops like described above. 10 minutes is 10 minutes give or take. It fit perfect and has run flawless to date. An easy choice for anyone needing a replacement on a T41 (T2374151).