Replacement battery fits 7 i-mate compatible models. Specifications: 1600mAh, 3.7V, Li-Polymer. Compatible with: Ultimate 6150, Ultimate 8150, Ultimate 8150 WIFI 3G, ANOW Q200, MWG P3811, MWG P3812 and 1 more compatible models. Replaces: I-Mate WDSO080204873, I-Mate 306-0000-00019, MWG WDSO080204873, MWG 306-0000-00019. i-mate replacement battery designed for Mobile/SmartPhone devices.