Replacement battery fits 18 Audioline compatible models. Specifications: 450mAh, 2.4V, Ni-MH. Compatible with: DECT 7500, DECT 7800, AEG Ventura TD9571, AEG Ventura TD9871, AEG D9, AEG D10 and 12 more compatible models. Replaces: GP 30AAAAH2BX, GP T323, Audioline 30AAAAH2BX, Audioline T323. Audioline replacement battery designed for Cordless Phone devices. Fits like the original manufacturer part.