Replacement Uniross 15C, BC101213 cordless telephone battery.
Rechargeable Uniross 15C, BC101213 battery to fit many telephones including Audioline, Betacom, Geemarc, Philips and others

1/2 AA x 3 - 15C (JST-PHR2(REV) Connector) Cordless Telephone Rechargeable Replacement Battery

Replaces 3.6V batteries:

FITS Following Cordless telephones

Battery Type: Ni-CD

Battery Voltage: 3.6V

Battery Capacity: 350mAh (Extended battery for longer life)

Colour: N/A

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 tool for between charges.