7.4V 600mAh Li-ion Replacement Battery Pack 2ICP/10/30/44

Custom Battery Pack 2ICP/10/30/44 2S1P — 7.4V Li-ion Replacement Battery

This is a 7.4V, 600mAh Li-ion replacement pack built in a 2S1P configuration — two cells in series. It measures 43.60 × 30.80 × 10.72mm and is intended as a direct swap for devices originally using the 2ICP/10/30/44 2S1P cell assembly. Match dimensions and connector orientation before installing.

• 2S1P cell configuration: Two cells wired in series produce the 7.4V nominal rail. The single parallel path means total capacity equals one cell — 600mAh. Any host device BMS calibrated to the original pack will expect this exact voltage window: roughly 6.0V discharged to 8.4V fully charged.
• Bench tested on actual hardware: We cycled this pack through charge and discharge on a cell analyser. The BMS protection triggered correctly at low-voltage cutoff, and capacity measured within 5% of the 600mAh rating after the first conditioning cycle.
• First-cycle calibration: Devices with an integrated fuel gauge read cell history to estimate state of charge. After swapping this pack in, run one complete charge-to-discharge cycle before trusting the capacity indicator — the gauge needs to profile the new cells to give accurate readings.

Pack running below 7.4V on arrival — what's normal and what isn't

Replacement packs ship at storage voltage, typically 3.7–3.8V per cell, which puts the 2S1P pack between 7.4V and 7.6V open circuit. That is not a fault. The pack has not been pre-charged to full. Charge it fully before first use — the charger will bring it to 8.4V. If the pack reads below 6.0V on arrival, the BMS may have tripped into deep-discharge lockout and will need a wake-up charge from a compatible charger.

Device rejecting the pack after installation

Some host devices run a voltage-range check or a BMS handshake on power-up before accepting a new pack. If the device powers off immediately or shows no response, the pack voltage at swap time may be too low to pass that check. Connect the charger first and bring the pack to at least 7.8V, then insert it into the device. If the device still rejects it, power cycle the host unit once with the pack seated and charger connected.