3.7V, 7500mAh, Li-Polymer Battery fits Hp, Airlife 100, 27.75WhBattery Fits Models: Airlife 100 Battery Part Numbers: 588119 001, 588982 001, Hstnn f23c, Hstnn f23c s 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 Our battery should have the exact dimensions and fitment as the original battery; the fit and finish are checked before dispatch.