Telstra Cricket A410 Replacement Battery 3.7V 1200mAh

Telstra Cricket A410 — 3.7V Li-ion Replacement Battery (A410)

This is a 3.7V, 1200mAh Li-ion battery for the Telstra Cricket A410 mobile phone. It also fits the Calcomp A410 and PCD Calcomp A410 variants sharing the same OEM part number. Swap it when the original cell can no longer hold charge through a normal day of calls and messaging.

• Cricket A410 / Calcomp A410 fit: All three model variants — Cricket A410, Calcomp A410, and PCD Calcomp A410 — use the same physical footprint, connector pin-out, and BMS handshake. One cell covers all three.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the A410 platform. The BMS accepted the charge profile without interruption and the protection circuit tripped correctly at low-voltage cutoff.
• Fuel gauge recalibration on first use: On first install, disable any fast-charge mode and run one complete discharge-charge cycle. This lets the fuel gauge IC map the new cell's discharge curve before high-current charging pushes current into an uncalibrated state.

Sudden shutdown at 20–30% on the A410 after a cell swap

The A410's fuel gauge IC retains the discharge curve of the old, degraded cell. When the new cell hits the voltage point the IC previously mapped as 20–30%, the phone interprets it as a critical low and cuts power — even though real capacity remains. The fix is a full calibration cycle: drain the phone to automatic shutdown, then charge uninterrupted to 100% with the screen off. After one complete cycle, the coulomb counter resets against the new cell and percentage readings stabilise.

A410 won't power on after sitting in storage with a flat battery

Li-ion cells that drain below roughly 2.5V trigger the BMS protection circuit, which latches the cell off to prevent damage. The phone shows nothing on screen — not even a charging animation — when you plug in the cable. Connect the charger and leave it untouched for 20–30 minutes; the charge IC delivers a slow trickle current to bring the cell back above the BMS re-enable threshold. Once voltage crosses approximately 3.0V, the BMS unlocks and normal charging resumes.