Siemens S45 6618 3618 V30148-K1310-X185-1 N4501-A100 battery.

Siemens S45, ME45, 6618, 3618, V30148-K1310-X185-1, N4501-A100 battery replacement Lion 3.7V 840mAh rechargeable batteries

Replaces SIEMENS 3.7V batteries:
CS-SIS45SL
V30148-K1310-X185-1 N4501-A100
CA0608.

Fits the Following Mobile Cell Telephones:
Siemens S45, ME45, 6618, 3618, V30148-K1310-X185-1, N4501-A100.

Battery Type: Lion
Battery Voltage: 3.7V
Battery Capacity: 840mAh (Extended battery for longer life).

WHY IS My battery has a different Ah, is it still OK to 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.

Colour: N/A.