Alcatel OT-280 Compatible Battery 3.7V 600mAh Li-ion CAB3010010C1

Alcatel OT-280 / OT-505 Series — 3.7V Li-ion Replacement Battery (CAB3010010C1)

This is a 3.7V 600mAh Li-ion replacement cell for Alcatel compact mobile phones including the OT-280, OT-363, OT-505, OT-303A, and over 30 additional models sharing the same battery bay. It restores power to phones that no longer hold charge or fail to turn on after the original cell has degraded. Voltage and form factor match OEM spec at 46.60 × 33.90 × 4.70mm.

• OT-280 / OT-505 platform compatibility: These models share the same battery bay dimensions, 3.7V nominal rail, and connector pinout across the range — which is why a single cell covers the full group. The BMS handshake is passive on this generation; no proprietary authentication chip to trip.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the OT-505 platform. The charge IC accepted the cell without fault flags, and the BMS held voltage above the 3.0V low-cutoff threshold through a full discharge sweep under normal phone load.
• Fuel gauge recalibration on first cycle: After fitting the new cell, run one full discharge to near shutdown, then charge uninterrupted to 100% before using the phone normally. The fuel gauge IC on these Alcatel models calibrated to the old cell's discharge curve — skipping this step causes the percentage counter to read incorrectly for the first several uses.

Why the OT-505 reports wrong battery percentage after a cell swap

The fuel gauge IC on this Alcatel platform tracks charge state using a coulomb counter referenced against the original cell's discharge curve. Swap in a new cell and that reference is mismatched — the counter hasn't seen the new cell's full capacity range. The phone may show 40% remaining and shut down, or sit at 100% longer than expected. One complete discharge-charge cycle resets the counter's endpoints and brings percentage reporting back in line.

Phone won't power on after sitting in storage with a flat battery

Li-ion cells that drop below approximately 2.5V trigger a BMS lockout — the protection circuit opens to prevent further discharge damage, and the phone reads as completely dead. Plugging into a charger may show nothing for the first 5–15 minutes while the charge IC trickle-charges the cell back above the 2.9V re-initialisation threshold. If the phone still won't respond after 20 minutes on a known-good charger, confirm the charger output reaches the handset — try a different cable and adapter before concluding the cell is unrecoverable.