366 SR1116SW & 365 SR1116W Watch Batteries

The 366 battery, also known by its IEC code SR1116SW, is a 1.55V silver oxide button cell measuring about 11.6mm across and 1.6mm thick. The 365, or SR1116W, is exactly the same size. Here you will find every 366 / 365 watch battery we stock, from Renata, Maxell and Seiko, so you can pick the brand you prefer.

The SW version is made for watches with a low power draw, such as most simple analogue quartz watches, while the W version suits watches that draw more power, for example those with alarms, backlights or chronograph functions. If you are not sure which you need, fit the same type as the battery that came out of your watch.

UK delivery is free on every order, and orders placed before 2pm Monday to Friday are dispatched the same day.

4 products