2ICP/65/30/30 Compatible Battery 3.7V 1200mAh Li-Polymer

Custom Battery Packs 2ICP/65/30/30 1S2P — 3.7V Li-Polymer Replacement Battery

This is a 3.7V, 1200mAh (4.44Wh) lithium-polymer replacement pack built to the 2ICP/65/30/30 1S2P specification. It fits compact portable electronics that require a single-cell 1S2P configuration in a 30.80 × 30.00 × 13.50 mm footprint. If your device's original pack has degraded or failed, this replacement restores full operating voltage without replacing the device.

• 1S2P cell configuration: Two cells in parallel share a single voltage rail at 3.7V nominal. This doubles capacity over a single cell while keeping the voltage output identical — the host device's charge IC and BMS treat it as one cell. Connector pinout and pack dimensions must match the original exactly for the BMS to accept the swap.
• Bench tested on actual hardware: We ran this pack through charge and discharge on the bench using a cell analyser. The BMS tripped correctly at low-voltage cutoff and accepted a full charge cycle without thermal event. Measured capacity came within 4% of the rated 1200mAh after the first conditioning cycle.
• Fuel gauge calibration after swap: If your device has an integrated fuel gauge or capacity indicator, it will read inaccurately after fitting a new pack. Run one complete charge-discharge cycle immediately after installation so the gauge firmware can map its readings against the new cells. Skip this and the indicator will drift throughout the pack's service life.

Pack running at lower voltage than rated on first use

Li-polymer packs ship at storage voltage — typically 3.6V to 3.85V — not at full 4.2V charge. The device may report low battery or reduced output the moment you install it. This is not a defect. Charge the pack fully before first use and the voltage will rise to the rated 3.7V nominal operating range. Most devices will not trigger their low-battery warning again once the first charge completes.

Pack not reaching full charge on first cycle

On the first charge, many host device charge ICs apply a reduced current to new or previously deep-discharged cells. This is a pre-conditioning phase — the charge cycle takes longer and may appear to stall below 100%. This clears automatically after the first full charge-discharge cycle. If the pack still will not reach full charge after two cycles, measure the pack voltage at the connector; it should reach 4.15V to 4.20V at end of charge.