Bea-fon C160 Replacement Battery 3.8V 700mAh

Bea-fon C160 — 3.8V Li-Polymer Replacement Battery (C160)

This 3.8V, 700mAh Li-Polymer battery replaces the original cell in the Bea-fon C160 mobile phone. It fits the standard C160 and the C160 Schwarz variant. When the factory cell degrades and the phone can no longer hold a usable charge, this battery restores normal operation.

• C160 and C160 Schwarz fit: Both variants use the same battery bay dimensions and connector orientation. The cell measures 44.20 × 41.00 × 4.60mm, matching the original footprint exactly so no modification is needed during installation.
• Bench tested on actual hardware: We ran this cell through full charge and discharge cycles on the C160 platform. The BMS accepted the charge handshake without error flags, and voltage held stable across the full discharge curve under standard call and standby loads.
• Fuel gauge recalibration on first cycle: After installing a new cell, run the phone down to automatic shutdown once before recharging. The C160's fuel gauge IC was calibrated to the old cell's discharge curve — one full cycle lets it map the new cell correctly and report accurate percentages.

Why the C160 reports wrong battery percentage after a cell swap

The C160 uses a fuel gauge IC that tracks charge using a stored discharge curve from the original cell. When you fit a new cell, that stored curve no longer matches the new cell's actual voltage-to-capacity profile. The gauge reads voltage and maps it to percentage using old data, so it can show 60% when the cell is nearly flat. One complete discharge-to-shutdown followed by a full charge resets the coulomb counter and lets the IC build a new curve against the replacement cell.

Sudden shutdown at 20–30% on the Bea-fon C160

This happens when the cell voltage drops below what the phone's processor and radio module need to stay on, even though the gauge still shows charge remaining. The C160's modem draws a current spike during a call or network search that the degraded — or newly fitted but uncalibrated — cell cannot sustain at that voltage. The phone cuts power to protect the circuit before the gauge reaches zero. After one full calibration cycle, the fuel gauge IC tracks the real voltage cliff and shuts down earlier in a controlled way rather than cutting out unexpectedly. Target a resting voltage of at least 3.7V before the first full charge.