It replaces my regular original battery. This extended battery lasts at least twice longer than my original one even with video and graphic concentrated applications. It's very good deal with the long last power. LOVE IT
I needed a battery for my Thinkpad, so I shopped around online. I was a bit skeptical about ordering the battery through Batterycentury. But, I decided to go out on a limb, and it was a worthwhile risk! I got the exact battery I wanted.
This new extended one is to replace to my small size original battery for my T43 laptop that I have been used for years. The old one was only lasting about 1.5 hours; With one, I got about 4.25 hours. I carried it for a long plane trip. It works great and price was quite low.
