IBM R61/T61 Compatible 4400mAh Battery for Thinkpad Widescreen R61i/R61/T61/T61P/T61i/R60i/R400/T400

Pros: * cost, it's cheaper than original 4-cell battery * build quality - seems not to be broken in your hands * lenovo pm informs that this battery is made by sanyo (and maybe it has sanyo cells inside)

Cons: * very low capacity, only 48wh, while original 4 cell battery has 37wh * lenovo power manager doesn't recognise it as genuine (it not expected to be genuine, but power manager software keep annoying me about this battery)

Other: If you need a backup battery - buy this. If you have more money - buy genuine, it's better.

Pros: Inexpensive Works right It reports a duration of 3:10 hours when loaded at 100% capacity. It was sent to my country for free.

Cons: No FRU: IBM parts have a code that identifies them precisely. It is reassuring to be able to check that the product is a replacement for the right FRU when purchasing online. The delivery took a lot of days. When I was about to start complaining it arrived. It's the 4400mAH version. It has a lower price and it's lighter than the higher capacity models, but also it offers a lower operation time per load.

Other: I got more than I expected for my money.