Doogee Y6 Replacement Battery BAT6523200 3.8V 3000mAh

Doogee Y6 / Y6c — 3.8V Li-Polymer Replacement Battery (BAT6523200)

This is a 3000mAh (11.4Wh) Li-Polymer cell built to the same 3.8V nominal specification as the original BAT6523200. It fits the Doogee Y6 and Y6c smartphones. Install it when the original cell no longer holds charge through a normal day of use.

• Y6 and Y6c compatibility: Both models use the same connector pinout, battery bay dimensions (85.60 × 64.08 × 3.44mm), and 3.8V charge termination voltage. The BMS handshake is identical across both variants, so one cell covers both.
• Bench tested on actual hardware: We cycled this cell through full charge and discharge on the Y6 platform. The BMS accepted charge termination at 4.35V, held stable voltage under sustained screen-on and modem load, and triggered low-voltage cutoff cleanly without false shutdown.
• Fuel gauge recalibration on first use: On first installation, disable fast charging and run one complete discharge down to auto-shutdown, then charge to 100% uninterrupted. This gives the fuel gauge IC a clean discharge curve against the new cell before high-current charging begins on an uncalibrated counter.

Sudden shutdown at 20–30% on the Doogee Y6 after a cell swap

The Y6 fuel gauge IC retains the discharge curve from the old, degraded cell. When a new cell is installed, the IC's stored curve no longer matches the actual voltage-versus-capacity relationship. Under modem or display load, the new cell's voltage temporarily sags, and the IC interprets that sag as hitting the low-voltage floor — even when significant charge remains. Running one full discharge-to-shutdown followed by an uninterrupted charge to 100% forces the coulomb counter to reset against the new cell's actual curve. After that cycle, the shutdowns stop.

Phone shows 100% immediately after installing the replacement cell

This happens when the fuel gauge IC reads residual voltage on the new cell — typically 3.85–3.90V from storage — and maps it straight to full capacity using the old, degraded cell's curve. It is not a fault with the replacement cell. The percentage will jump or drop unpredictably until the IC runs one full calibration cycle. Discharge the phone to auto-shutdown without interruption, then charge to 100% in a single session to anchor the new curve correctly.