1x Battery for Apple Watch Series S8 45mm A2815 (300mAh, 3.86V) from CELLONIC  ...  more

100% compatible replacement for Apple batteries

Specifically designed to fit your smartwatch. See the full compatibilities list.

Guaranteed 300mAh capacity

Unlike many competitors, our battery capacities are true, real and guaranteed. This Lithium-Polymer battery is 300mAh and offers long runtimes with fewer charging breaks - exactly as advertised.

High-performance 3.86V A2815 battery

Our long-life replacement smartwatch batteries deliver consistently high performance that matches or exceeds that of your fitness tracker’s original battery - all for a high number of charging cycles.

Superior quality and safety standards

Battery specialists since 2004, all our replacement batteries undergo strict, rigorous testing to fully comply with the highest EU standards and beyond - that’s why they come with a 3-year guarantee.

The sustainable choice

Replace the battery, not your watch. It’s the smarter, cheaper, eco-friendlier choice, saving you money while cutting your environmental footprint through recycling.

Choose CELLONIC and never compromise on quality. Order now!