CX731S, V329, GP329, 329, LM61 Silver Oxide Button Cell . 1.55V High Capacity.

Typically for watches & calculators and miniature equipment 7.9 X 3.1mm. Equivalent to V329, GP329, 329, LM61

Note: Battery Iilustrations are for identification only. Type numbers and manufacturers may vary. All batteries are high quality brands