The Renata 364 is a silver oxide watch battery, also known by its standard code SR621SW. If your watch has stopped, this small 1.55V cell is a cheap and simple fix. Renata is a Swiss battery maker and part of the Swatch Group.
The 364 measures 6.8mm across and 2.1mm thick, with a rated capacity of 19mAh, and it’s made for powering watches. You may also see this size listed as SR60, V364 or D364, so check the code on your old battery and match it before you buy. It comes as a single cell, which makes it a great value way to replace just the one you need without paying for a multipack. Swap it in, and you’re back on time.
Product Features
- Battery size/type: 364 watch battery (SR621SW, also SR60)
- Chemistry: Silver oxide
- Voltage: 1.55V
- Capacity: 19mAh
- Size: 6.8mm diameter x 2.1mm
- Pack size: Single cell
- Model numbers: MPN: 364WB
- Barcode: GTIN: 785618308839
Order before 12pm Monday to Friday for same-day dispatch on in-stock items, or Click & Collect from your local Home Hardware store.









