RS PRO LIR2050 Button Battery, 2.75V, 20mm Diameter, Single

Needing a compact solution to power your electronic devices such as torches, wristwatches and LED-based (light-emitting diode) applications? This RS PRO button battery is a circular, non-rechargeable source that delivers reliable power to a range of instruments.
The item's 20 mm diameter makes it compact and light so you can use it with confidence in your small electronic applications and it won't take up too much space or add too much weight. You can rest assured that the high energy density of this lithium-ion battery reliably delivers 500 life cycles, meaning you won't have to replace it frequently.
This product complies with the RoHS (Restriction of Hazardous Substances) requirements, meaning it contains no more than trace amounts of any harmful substances. You can use the battery for both domestic and industrial devices.