315 (SR716) Watch Batteries
The 315 button battery is a compact, higher-capacity power supply, used in many high-end wrist watches. Other names/designations for batteries of this size and capacity are SR716SW, SR67, RW316, D315, V315(530), 28056, SB-AT, and SR716.
These cells are manufactured with silver oxide technology, and have a typical capacity of 21mAh and an output of 1.55V. The case measures 7.99mm in diameter with a thickness of 1.6mm.