About this replacement
Huawei Watch 5 / Watch 5X / Watch 5X Pro — 3.88V Li-Polymer Replacement Battery (HB652933EGW)
This is a 3.88V, 780mAh lithium-polymer cell carrying OEM part number HB652933EGW. It fits the Huawei Watch 5, Watch 5X, and Watch 5X Pro smartwatches. Dimensions are 31.60 × 28.00 × 6.60mm — confirm these against your existing cell before fitting.
- Watch 5 series compatibility: The Watch 5, Watch 5X, and Watch 5X Pro share the same battery bay geometry, connector pin-out, and BMS handshake protocol. All three accept HB652933EGW without modification.
- Bench tested on actual hardware: We cycled this cell through charge and discharge on the Watch 5 platform. The BMS accepted the cell without error flags, fuel gauge recalibrated correctly after a full charge cycle, and health sensors remained active throughout.
- Post-swap charge cycle: After fitting this cell, place the watch on its magnetic charger immediately and bring it to 100% before first use. The fuel gauge IC loses its reference point during a cell swap. Without a full charge from near-zero, the percentage display will read inaccurately for days.
Why continuous heart rate monitoring shortens charge intervals on a new cell
The Watch 5 series uses a multi-wavelength optical sensor for continuous HR tracking. On a new cell, internal impedance is slightly higher than a broken-in cell, so the sensor draws a marginally larger current to maintain signal quality. This effect typically flattens out after five to seven full charge cycles as the cell's internal resistance drops. During that break-in window, charge intervals may be shorter than expected — this is normal and not a fault with the replacement cell.
Watch not pairing to phone after battery replacement
Removing the battery cuts power to the BLE stack entirely, which terminates the active session stored on both the watch and the paired phone. When the watch restarts, it generates a new session key that the phone does not recognise. Open the Huawei Health app, navigate to device settings, remove the existing watch entry, and re-pair from scratch. The watch should appear in the device list within 30 seconds of initiating a fresh pairing.