Sonim XP5 Replacement Battery BAT-03180-01S 3.8V 3000mAh

Sonim XP5 Series — 3.8V Li-ion Replacement Battery (BAT-03180-01S)

This is a 3.8V, 3000mAh Li-ion cell built to the BAT-03180-01S specification for the Sonim XP5 family of rugged smartphones. It fits the XP5, XP5700, XP5s, and XP5800. Capacity is 11.4Wh, matching the original cell footprint at 65.10 × 43.74 × 9.90mm.

• XP5 family compatibility: The XP5, XP5700, XP5s, and XP5800 all share the BAT-03180-01S form factor, connector pinout, and BMS handshake. Swapping between these models does not require any firmware or hardware change — the fuel gauge IC reads the same cell chemistry across all four variants.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on XP5-series hardware and confirmed the BMS accepted the cell without error flags. The protection circuit tripped correctly at the low-voltage cutoff and resumed charging without a manual reset.
• Fuel gauge recalibration on first use: On first installation, disable fast charging and run one full discharge-to-charge cycle before enabling it again. The fuel gauge IC on the XP5 calibrates its coulomb counter against the cell's actual discharge curve — skipping this step can cause the OS to misreport state of charge for weeks.

Sudden shutdown at 20–30% on the Sonim XP5 after a cell swap

This is a voltage cliff issue, not a capacity fault. When the XP5 is running the modem at full power — push-to-talk, cellular data, or GPS — the current draw spikes and the new cell's terminal voltage drops faster than the fuel gauge IC expects. The OS reads 25% state of charge, but the cell voltage under load has already fallen below the BMS cutoff threshold of around 3.0V. One full discharge-charge cycle lets the coulomb counter remap the actual voltage-to-capacity curve of the new cell and eliminates most cliff shutdowns.

Phone does not power on after the replacement battery sat in storage

If this cell was stored in a discharged state, the cell voltage may have dropped below 2.5V — the BMS enters lockout to prevent damage to the lithium cells. A standard USB cable will not wake the phone because the system bus has no power to negotiate the charge protocol. Connect the XP5 to a wall charger rated at 5V/1A or higher and leave it for 20–30 minutes without pressing the power button — the charge IC will trickle current into the cell until voltage recovers above 3.0V, at which point the BMS exits lockout and the phone will boot normally.