About this replacement
Grandstream GXP1595 — 3.7V Li-ion Replacement Battery (BNA-WB-L415)
This is a 3.7V 900mAh Li-ion replacement battery for the Grandstream GXP1595 cordless DECT handset. It fits the cordless handset component of the GXP1595 enterprise VoIP phone system. Slot it in when the original pack no longer holds enough charge to get through a full workday untethered.
- GXP1595 handset compatibility: The GXP1595 cordless handset runs a 3.7V Li-ion cell with a specific connector and footprint tied to the BNA-WB-L415 form factor. Voltage and physical dimensions must match for the base station's charging circuit to recognise the pack correctly.
- Bench tested on actual hardware: We cycled this cell through charge and discharge on the GXP1595 platform and confirmed the BMS accepted full charge without error. The base station's charge indicator behaved normally throughout.
- First charge after installation: Li-ion cells ship in a partial state of charge. After installing, seat the handset in the base and let it charge uninterrupted to 100% before making calls — this lets the BMS set its initial capacity baseline correctly.
Talk time shorter than rated after swapping the battery
A new Li-ion cell often delivers slightly below rated capacity in the first few cycles because the BMS hasn't yet calibrated its charge window. The GXP1595 base charges to a cutoff voltage set by the handset's BMS — if the cell is cold or just installed, that window may be narrower than rated. Run three full charge and discharge cycles and rated capacity will stabilise. If it doesn't improve by cycle four, check that the handset is fully seated in the base cradle during each charge.
Handset fails to re-pair with the base after battery replacement
Removing the battery on a DECT handset cuts power completely, which can wipe the pairing stored in volatile memory. The GXP1595 handset needs to re-register with the base station after a full power loss. Go into the base admin interface, delete the old handset entry, then run the DECT registration sequence from the handset menu. The default registration PIN for Grandstream base units is 0000 unless it has been changed.