About this replacement
Huawei Honor 2 / U9508 — 3.8V Li-ion Replacement Battery (HB5R1V)
This is a 3.8V, 2000mAh Li-ion cell replacing OEM part HB5R1V. It fits the Huawei Honor 2, Honor II, Honor Quad, and U9508 — all models sharing the same battery bay and connector pinout. Capacity figure comes from the product data, not a third-party source.
- Honor 2 / U9508 platform fit: These models run the same PCB layout and use identical connector orientation and BMS handshake logic, so a single cell covers the full range without modification.
- Bench tested on actual hardware: We ran the HB5R1V through charge and discharge cycles on U9508 hardware. The BMS accepted charge current normally, held voltage through screen-on and modem-active load, and tripped cutoff correctly at the low-voltage threshold.
- Fuel gauge recalibration on first use: After fitting this cell, disable fast charging and run one full discharge-to-charge cycle at standard rate. The Honor 2's fuel gauge IC was calibrated to the original cell's discharge curve — one slow cycle lets it re-map against the new cell before high-current charging begins.
Sudden shutdown at 20–30% on the Honor 2 after a cell swap
A fresh Li-ion cell has a slightly different voltage-to-capacity curve than the worn cell the fuel gauge IC was trained on. When the phone reports 25%, the actual cell voltage may already be near the load-collapse point under modem or display current draw. The phone shuts down not because the battery is faulty, but because the fuel gauge is reading from the wrong map. One full discharge cycle — letting the phone run down to automatic shutdown, then charging uninterrupted to 100% — resets the coulomb counter and resolves most mid-charge shutoffs.
Honor 2 not powering on after extended storage with a discharged battery
If this cell sat discharged below approximately 2.5V, the BMS enters a protective lockout state and will not pass current to the device, even when a charger is connected. Connect the phone to a low-output charger — a 5V/0.5A USB port works better here than a fast charger — and leave it for 20–30 minutes before pressing the power button. The trickle current slowly brings cell voltage above the BMS re-enable threshold, typically around 2.8–3.0V, at which point normal charging resumes.