2ICP60/35/51 Compatible Battery Pack 3.7V 2200mAh Li-ion

Custom Battery Pack 2ICP60/35/51 — 3.7V Li-ion Replacement Battery

This 3.7V Li-ion cell replaces the OEM part numbered 2ICP60/35/51, rated at 2200mAh (8.14Wh). It fits portable consumer electronics — smartphones, tablets, and similar handheld devices — that originally shipped with this cell configuration. Physical dimensions are 52.80 × 34.10 × 11.10mm; confirm these match your existing cell before fitting.

• Cell format and BMS handshake: Devices using the 2ICP60/35/51 designation run a single-cell Li-ion configuration at a nominal 3.7V rail. The host device reads cell voltage and sometimes authentication data via the connector — a mismatch in either will trigger a rejection state before the pack even begins to charge.
• Bench tested on actual hardware: We cycled this pack through charge and discharge on the bench, monitoring BMS cutoff behaviour at both ends of the voltage curve. The protection circuit engaged correctly at the low-voltage threshold, and charge acceptance from storage voltage to full proceeded without current limiting errors after the first cycle.
• Fuel gauge calibration after swap: Run one complete charge-discharge cycle immediately after installation. Packs with integrated fuel gauges lose their calibration reference when cells are swapped — the device's capacity indicator will read inaccurately until the gauge re-learns the new cell's actual low and high endpoints.

Pack running at lower voltage than rated on first use

Li-ion cells ship at storage voltage — typically 3.6V to 3.65V rather than the nominal 3.7V rated value. This is intentional; shipping at full charge accelerates cell degradation in transit. Your device may report low battery or behave erratically until the pack reaches full charge for the first time. Connect to the charger before use and allow a complete charge cycle to bring the cell to its rated operating window.

Pack not reaching full charge on the first cycle

On first charge, some host devices apply a reduced current rate — often called pre-charge or trickle conditioning — when the charge IC detects a new or deeply discharged cell. This limits how quickly the pack reaches full voltage and can make the device appear to cap out early. This behaviour clears automatically after one full charge cycle. If the pack still fails to reach full charge after two cycles, verify the charger output matches the device's rated input specification.