About this replacement
Huawei F501 / F516 / F530 — 3.7V Li-ion Replacement Battery (HB6A3)
The HB6A3 is a 3.7V Li-ion cell rated at 1800mAh (6.66Wh), replacing the original battery in Huawei cordless DECT handsets including the F501, F516, F530, and FP515H. It slots into the handset battery compartment and reconnects the handset to the base station's charge contacts. Voltage and connector match the OEM spec exactly.
- F501 / F516 / F530 / FP515H platform fit: These Huawei handsets share the same battery bay dimensions, connector pinout, and 3.7V charging rail from their respective base stations. A single cell revision covers the full group without modification.
- Bench tested on actual hardware: We cycled this cell through charge and discharge on a DECT handset chassis. The BMS held a stable charge termination voltage and did not trigger protection cutoff during normal standby or active call simulation.
- First-charge procedure on Li-ion DECT handsets: After fitting the HB6A3, seat the handset in the base and leave it undisturbed for a full charge cycle before first use. Li-ion cells in DECT bases charge at a low trickle rate — interrupting this early shortens the capacity the cell can access on the first cycle.
Talk time shorter than original battery after replacement
A new Li-ion cell often delivers noticeably less talk time on the first two or three cycles. This happens because the cell ships in a partial state of charge and the BMS hasn't yet calibrated its internal capacity estimate. Run two or three full charge-and-discharge cycles through normal use and the handset's fuel gauge will recalibrate. By cycle three, capacity should be at or near the rated 1800mAh.
Base station shows no charge light after fitting new battery
Some Huawei base stations won't begin charging if the incoming cell voltage is below the acceptance threshold — typically around 3.0V. A battery that has sat in storage at low voltage can fall under this floor. Remove the handset, wait 30 seconds, then re-seat it firmly so both charge contacts are flush. If the base still shows no activity, connect the base unit to mains power and confirm the power LED is active before re-seating the handset.