Dopod 515 PC26A Replacement Battery 3.7V 1150mAh

Dopod 515 — 3.7V Li-ion Replacement Battery (PC26A)

This is a 3.7V, 1150mAh Li-ion replacement cell for the Dopod 515 Windows Mobile smartphone. It slots directly into the original battery bay and uses the same OEM part number PC26A. If your 515 won't hold charge or refuses to power on, this cell replaces the degraded original.

• Dopod 515 fitment: The 515 uses a single-cell 3.7V Li-ion pack with a three-contact connector carrying voltage, ground, and a thermistor line. Any replacement must match all three contacts — this cell does. The BMS on the phone reads the thermistor to gate charging current, so a missing or mismatched contact will prevent the charge IC from activating.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on a 515 unit and confirmed the charge IC accepted the thermistor signal correctly. The BMS engaged at the expected cutoff voltage and did not trip on a standard charge cycle.
• Fuel gauge recalibration on first use: On first installation, run one full discharge to near-empty before charging completely. The 515's fuel gauge IC was calibrated to the old cell's discharge curve — skipping this step causes the phone to report inaccurate percentages until the IC relearns the new cell's behaviour.

Sudden shutdown at 20–30% on the Dopod 515

Aged Li-ion cells develop a sharp voltage cliff — voltage drops steeply under load before the fuel gauge predicts it. On the 515, the modem and backlight draw enough current to trigger this cliff while the gauge still reads 20–30%. The phone's low-voltage cutoff fires before the gauge catches up, causing an abrupt shutdown. A fresh cell with a flatter discharge curve eliminates the cliff — after one full calibration cycle, the gauge tracks voltage correctly down to around 3.4V under load.

Phone won't power on after sitting in a drawer for months

Li-ion cells left discharged in storage self-discharge past the BMS lockout threshold — typically below 2.5V per cell. When voltage drops that low, the BMS on the 515 cuts all output to protect the cell from permanent damage. Plugging the charger in may show no response at all. Leave the phone on charge for 20–30 minutes without attempting to power it on — the charge IC will trickle current into the cell until it recovers above 2.8V, at which point the BMS re-engages and normal charging resumes.