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Small rectangular lithium-ion battery for Apple Watch Series 6 40mm

eForChina

eForChina Li-ion Battery Apple Watch Series 6 40mm watch accessory

SKU CH-5KA2-XWGT7

Li-ion replacement battery restores power to a 40 mm Apple Watch Series 6

  • Product typeWatch Batteries
  • Li-ion replacement restores power to Apple Watch Series 6 40mm
  • New battery replaces a broken or unusable original unit
  • Each unit checked and confirmed in good condition before shipping
  • Designed to fit and work completely with the 40mm model
  • Professional installation recommended to avoid damage during replacement

Purpose-built replacement

This Li-ion battery is a direct replacement for the Apple Watch Series 6 40mm. It is intended for owners whose original cell no longer holds a charge or has swollen. The part restores the watch’s runtime without altering its form factor.

Verified fit and condition

Each unit is checked before shipping and arrives in good condition. The connector and dimensions match the factory layout so the battery seats correctly inside the 40mm case. Professional installation is highly recommended because the watch must be opened and resealed with care.

Restores original endurance

This component replaces a degraded or failed factory battery and returns the watch to its designed run time. The upgrade is worthwhile when the existing cell drains quickly, shuts down unexpectedly or shows physical swelling. It is not a capacity increase over the original specification.

How it compares

Measured against everything we stock in Watch Bands, Cases & Chargers, at today’s prices. Recalculated every night.

Price $12.99
Cheaper than about 60% of the 358 comparable items (median $14.99).

Specifications

Product
Product typeWatch Batteries

Questions about this item

Does the Li-ion battery replacement for Apple Watch Series 6 40mm use the original Apple connector and flex cable layout?

Yes, the replacement cell is built to the same connector and flex layout as the original 40 mm Series 6 battery, so it plugs directly onto the logic board without adapters.

What opening tools and adhesive are required to fit the battery into the 40 mm Series 6 case?

You need a heat gun or iOpener to soften the display adhesive, a suction handle and opening picks to lift the screen, a Y000 driver for the battery screws, and fresh waterproof adhesive strips to reseal the watch.

Which installation step do DIYers most often get wrong when swapping the Series 6 40 mm battery?

Many forget to disconnect the battery flex cable before prying the old cell out, which can short the logic board; always unplug the connector first, then remove the adhesive.

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