Apple Watch S6 40mm Battery

The Apple Watch Series 6 40 mm uses a built-in rechargeable lithium-ion battery designed specifically for this smartwatch model. It’s non-removable by the user and optimized to deliver all-day use with efficient power management for Apple Watch features.

📦 Battery Type & Specs (Typical OEM / Replacement)

• Battery Type: Lithium-ion (Li-ion) rechargeable battery

• Model / Replacement Part: Often labeled A2345 for Series 6 40 mm replacements

• Capacity: ~265.9 mAh (1.024 Wh) — this is the amount of electrical charge the battery holds

• Voltage: ~3.85 V (standard for Apple Watch batteries)

• Size / Fit: Made to fit the internal battery compartment of the 40 mm Apple Watch Series 6

• Type of Installation: Internal module — requires careful removal of the screen and adhesive seals for replacement

This type of battery is what powers all components of the watch including the display, sensors, connectivity, and processor.