IBM 40Y7001 Battery are made from a grade cells and highest quality parts, the IBM laptop battery are tailored made according to the original size, whether the battery appearance, size and quality are the same as with the original. Every laptop battery should be under strict quality control including filtration and safety testing of voltage,capacity and battery core before leaving the factory, and has passed the authentication of CE, UL, EMC, CQC,ROHS, etc.
The original battery on my laptop started at about 100-minutes play time and it slowly degraded to less than one hour. I am happy to note that this replacement can give me up to 3 hours of laptop use - not DVD-watching.
Charges quickly, lasts a long time, fairly light. Do yourself a favor and run the battery down instead of leaving the laptop plugged in all of the time.

