HB5F1H Huawei U8860 Replacement Battery 3.7V 1400mAh

Huawei Honor U8860 — 3.7V Li-ion Replacement Battery (HB5F1H)

This is a 3.7V, 1400mAh Li-ion cell that replaces the original HB5F1H battery in the Huawei Honor U8860 and compatible models including the M886 and Turkcell T30. It slots directly into the battery bay and connects to the same three-contact terminal used by the factory cell. Dimensions are 53.80 × 42.30 × 5.60mm — measure your original before ordering if you are unsure.

• U8860 / M886 / Turkcell T30 compatibility: These models share the same physical footprint, terminal layout, and BMS handshake protocol, which is why one cell number — HB5F1H — covers the full range. The voltage rail and contact pinout are identical across the group.
• Bench tested on actual hardware: We cycled this cell on the U8860 platform and confirmed the BMS accepted charge immediately without a reset sequence. The protection circuit tripped correctly at low-voltage cutoff and recovered on reconnection to a live charger.
• Fuel gauge recalibration on first use: After installing this cell, run one full discharge to automatic shutdown, then charge uninterrupted to 100% before normal use. The U8860 fuel gauge IC holds the discharge curve of the old cell in memory — skipping this cycle causes the reported percentage to drift from the third or fourth day onward.

Sudden shutdown at 20–30% on the U8860 after a cell swap

The U8860 shuts down under load before the gauge hits zero because the modem radio and display draw a combined current spike that new cells handle differently than aged ones. The fuel gauge IC was calibrated against the original cell's internal resistance curve, so it underestimates the voltage sag a new cell produces at that load. When the terminal voltage drops momentarily below the hardware cutoff threshold — even briefly — the phone cuts power to protect the circuit. One full discharge-charge cycle resets the coulomb counter and eliminates the premature cutoff in most cases.

Phone warm near the battery bay during the first two charging sessions

A new cell has higher internal impedance than a battery that has been through dozens of cycles, so the charge IC on the U8860 mainboard dissipates more heat as resistance during those first sessions. This is a normal electrochemical condition — not a fault with the cell or the charger. The warmth typically drops off after the second full charge as impedance falls. If the phone becomes hot to the touch rather than warm, disconnect immediately and check that the battery contacts are fully seated.