About this replacement
Philips S616 / Xenium S616 — 3.7V Li-ion Replacement Battery (AB3000GWMT)
This is a 3.7V, 2900mAh Li-ion replacement battery for the Philips S616 and Xenium S616 smartphones. It matches OEM part number AB3000GWMT and fits directly into the standard battery bay on both named models. Voltage and capacity match the original specification from Philips.
- S616 and Xenium S616 compatibility: Both models run the same 3.7V power rail, use the same AB3000GWMT connector footprint, and share the same BMS handshake protocol — a single cell covers both variants without modification.
- Bench tested on actual hardware: We cycled this cell on an S616 unit and confirmed the BMS accepted the new cell without a fault flag, charge current stepped correctly through CC and CV phases, and the protection circuit tripped at the expected over-discharge threshold.
- Fuel gauge recalibration on first use: On first installation, disable fast charging and run one complete discharge-to-charge cycle before enabling any accelerated charge mode. The fuel gauge IC on the S616 is calibrated to the original cell's discharge curve — giving it one full uninterrupted cycle lets it recalibrate against the new cell before high-current charging begins.
Sudden shutdown at 20–30% on the Philips S616 after a cell swap
This is a voltage cliff issue, not a capacity problem. Under modem transmission load or screen-on bursts, a new cell that hasn't been calibrated can sag below the BMS cutoff voltage while the fuel gauge still reads 20–30%. The phone interprets the voltage drop as a fault and cuts power to protect the circuit. Running one full discharge cycle — down to automatic shutdown, then charging uninterrupted to 100% — teaches the coulomb counter where the new cell's actual voltage floor sits, and the false shutdowns stop.
Phone won't power on after the replacement battery sat in storage
Li-ion cells self-discharge during storage, and if the AB3000GWMT arrived below approximately 2.5V, the BMS will have entered lockout mode to prevent a deep-discharge charge attempt. The phone shows nothing — no boot, no charge indicator — because the BMS is blocking current inflow. Connect the phone to a wall charger (not a USB port) and leave it untouched for 20–30 minutes. The charge IC will trickle current into the cell at a reduced rate until voltage climbs above 2.9V, at which point the BMS releases and normal charging resumes.