Nokia BL-5B-extended battery rechargeable mobile phone.

Replacement Nokia BL-5B-extended battery to fit 3610, 5210, 6500, 6510, 6590, 6590i, 7150, 7650, 8210, 8250, 8270, 8290, 8310, 8390, 8850, 8850G, 8890, 8910, 8910i.

Charge fully when the battery order arrives and first use.

Replaces NOKIA 3.7V batteries:
BLB-2, BL-5B

Fits Following Nokia Mobile Cell Telephones
Nokia ; 3610, 5210, 6500, 6510, 6590, 6590i, 7150, 7650, 8210, 8250, 8270, 8290, 8310, 8390, 8850, 8850G, 8890, 8910, 8910i.

Battery Type: Li-ion
Battery Voltage: 3.7V
Battery Capacity: 1000mAh (Extended battery for longer life)

The Ah is different on my old battery, can I still use yours?
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.