10.8V, 4400mAh, Li-ion Battery fits Ibm, Thinkpad R40e, Thinkpad R40e-2684, 47.52WhBattery Fits Models: Thinkpad R40e, Thinkpad R40e 2684, Thinkpad R40e 2685 Battery Part Numbers: 08k8218, 92p0987, 92p0988, 92p0989, 92p0990, Fx00364 If you are worried about the quality or the performance of the products from Cameronsino, take a look at the reviews from our customers. Sound quality is assured as the products are manufactured to a very high standard Cameron Sino is one of the world's most successful third party battery manufacturers;