Archos  AV605 120GB, AV605 160GB, AV605 30GB, AV605 80GB, AV605 Wifi 160GB, AV605 Wifi 30G, AV605 Wifi 605 GPS 30GB, AV605 Wifi 605 GPS 4GB, AV605 Wifi 80GB FT447770P, HB4G14L  Battery Replaces ARCHOS 3.7V BATTERIES: FT447770P, HB4G14L FITS Following ARCHOS Media Center / MP4 Players Archos  AV605 120GB, AV605 160GB, AV605 30GB, AV605 80GB, AV605 Wifi 160GB, AV605 Wifi 30G, AV605 Wifi 605 GPS 30GB, AV605 Wifi 605 GPS 4GB, AV605 Wifi 80GB Battery Type: Li-PL Battery Voltage: 3.7V Battery Capacity: 2500mAh IS YOUR AH RATING IS DIFFERENT? The AH (Amp Hour) Rating is the storage (or fuel) of the battery, the higher it is the longer the battery lasts between charges, bit like petrol in your car so a higher or lower one makes no different to the performance, just the length of time you can use the battery for between charges.