CX616S, V321, 321, LR65, SR65, 616, Silver Oxide Button Cell  1.55V High Capacity.

Typically for watches & calculators and miniature equipment 6.8 X 1.6mm. Equivalent to V321, 321, LR65, SR65, 616, LR616, SR616. Main use is for ladies and slim watches.

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