2ICP/52/34/46 1S2P Compatible Battery 7.4V 1200mAh

Custom Battery Pack 2ICP/52/34/46 1S2P — 7.4V Li-ion Replacement Battery

This is a 7.4V Li-ion battery pack rated at 1200mAh (8.88Wh), built in a 1S2P configuration — one series group with two cells in parallel. It replaces the OEM pack identified by part number 2ICP/52/34/46 1S2P. Dimensions are 50.00 × 34.00 × 12.00 mm, so confirm your bay clearance before fitting.

• 1S2P cell configuration: Two cells run in parallel within a single series group. This keeps the output at 7.4V nominal while doubling cell-level current capacity compared to a 1S1P pack. The BMS monitors the parallel group as a single node, so cell matching at the pack level matters — both cells in this pack are matched before assembly.
• Bench tested on actual hardware: We cycled this pack through charge and discharge on the bench, monitoring BMS cutoff thresholds at both ends. The protection circuit tripped correctly at the low-voltage cutoff and resumed charge acceptance without needing a manual reset.
• First-cycle calibration: If your device shows a fuel gauge or capacity indicator, run one full charge-to-discharge cycle immediately after installation. The integrated fuel gauge in many devices calibrates its state-of-charge model against the new cells on that first full sweep — skipping it can leave the indicator reading inaccurate for weeks.

Pack running at lower voltage than rated on first use

Li-ion packs ship at storage voltage — typically 3.7V to 3.85V per cell, which puts a 7.4V nominal pack somewhere between 7.4V and 7.7V at rest. This is intentional. Shipping at full charge accelerates cell degradation in transit. If your device reports low battery or behaves sluggishly straight out of the packaging, charge the pack fully before drawing any load from it. A rested, fully charged 7.4V Li-ion pack should measure approximately 8.3V to 8.4V at the terminals.

Pack not reaching full charge on the first cycle

On the first charge cycle, the charge IC in the host device or charger often applies a reduced current to new or deeply stored cells — this is a deliberate conditioning behaviour, not a fault. The pack may appear to stop charging earlier than expected or the charge indicator may plateau before 100%. Run the full charge cycle to completion without interrupting it. By the second or third cycle, the charge IC typically unlocks full current and the pack reaches its rated 1200mAh capacity consistently.