Battery for K7S5A

[baldhead]

Hello,
which battery do I need for K7S5A

 

[o1die]

Just pop it out and take it with you; it's a lithium "button battery" sold at computer shops and some target and walmarts for $2-3. Frys sells a pack of 4 for $5. http://www.batteryjunction.com/encocebaeccr4.html