The 371 watch battery, also known as SR920SW (IEC code SR69), is a 1.55V silver oxide button cell about 9.5mm across and 2.0mm high. The 370, also known as SR920W, is the same size. This page brings together every 371 and 370 battery we stock, all genuine Japanese cells from Maxell, Murata, Seiko and Seizaiken.
Choose the SW version for an ordinary analogue watch with a low power draw, and the W version for watches that use more power, such as models with alarms, lights or chronographs. If in doubt, replace like with like and match the code on the battery you took out.
UK delivery is free on every order.
