Huawei Honor 2 Replacement Battery HB5R1V 3.7V 1700mAh

Huawei Honor 2 / U9508 — 3.7V Li-ion Replacement Battery (HB5R1V)

This is a 3.7V, 1700mAh Li-ion cell built to the HB5R1V specification. It fits the Huawei Honor 2, Honor II, Honor Quad, and U9508 handsets. Swap it when the original cell no longer holds a usable charge or the phone shuts down unexpectedly under load.

• Honor 2 / U9508 platform fit: These variants share the same battery bay dimensions, connector pinout, and BMS handshake. The HB5R1V spec covers all of them — voltage rail and thermistor line are identical across the group.
• Bench tested on actual hardware: We cycled this cell on a U9508 unit and monitored BMS behaviour through charge and discharge. The protection circuit tripped correctly at the low-voltage cutoff and resumed charging without error after recovery.
• Fuel gauge recalibration on first use: On first use after installation, disable fast charging and run one full discharge-charge cycle at standard rate. This lets the fuel gauge IC map its coulomb counter to the new cell's actual discharge curve before high-current charging begins on an uncalibrated cell.

Sudden shutdown at 20–30% on the Honor 2 after a cell swap

This is a voltage cliff issue, not a capacity problem. Under peak load — modem activity, screen at full brightness — the new cell's internal resistance causes voltage to sag below the processor's minimum threshold while the fuel gauge still reads 20–30%. The phone interprets this as a hardware fault and shuts down to protect the SoC. One complete discharge to automatic shutoff, followed by a full uninterrupted charge, recalibrates the coulomb counter and resolves most cases.

USB charging not recognised on first connection after replacement

After a cold cell install, the charge IC on the U9508 sometimes fails to negotiate the charging profile on the first connection, especially if the replacement cell came off the shelf at a low state of charge. Plug into a standard 5V USB source — not a fast charger — and leave it connected for at least 10 minutes without pressing the power button. Once the cell climbs above approximately 3.0V, the BMS exits lockout and normal charging resumes.