Alcatel TLp026E2 One Touch Idol 4 Replacement Battery 3.8V 2200mAh

Alcatel One Touch Idol 4 — 3.8V Li-Polymer Replacement Battery (TLp026E2)

This is a 3.8V, 2200mAh Li-Polymer replacement battery for the Alcatel One Touch Idol 4 and One Touch Idol 4 LTE Dual SIM smartphones. OEM part numbers TLp026E2, TLp026EJ, and CAC2610005CJ cross-reference to this cell. It fits the OT-6055H, OT-6055Y, and several additional OT-6055 variants.

• OT-6055 platform fit: The OT-6055H, OT-6055Y, and related Idol 4 variants share the same battery bay dimensions, connector pinout, and BMS handshake protocol — one cell covers all of them without modification.
• Bench tested on actual hardware: We ran the TLp026E2 cell through full charge-discharge cycles on the OT-6055 platform. The BMS accepted the cell without error flags, and the fuel gauge IC tracked state-of-charge correctly after one complete cycle.
• First-cycle fuel gauge reset: On first use after installation, disable fast charging and run one complete discharge-to-charge cycle. This lets the fuel gauge IC recalibrate its discharge curve against the new cell before high-current charging starts pushing current into an uncalibrated state-of-charge map.

Sudden shutdown at 20–30% on the Idol 4 after a cell swap

A fresh Li-Polymer cell has a steeper voltage cliff than a worn cell. When the modem fires a high-power transmission burst or the screen ramps brightness, current draw spikes sharply. If the fuel gauge IC is still calibrated to the old cell's discharge curve, it can read 25% remaining while the actual cell voltage has already dropped below the BMS cutoff threshold. The phone shuts down to protect the cell — not because the battery is faulty. One full discharge-charge cycle without fast charging forces the coulomb counter to remap against the new cell, and the premature shutdowns stop.

Idol 4 won't power on after sitting in a drawer for months

Li-Polymer cells self-discharge at roughly 2–3% per month. After extended storage, the cell can drop below 2.5V — the threshold where the BMS latches into deep-discharge lockout to prevent cell damage. The phone won't respond to the power button and may show nothing on screen even when plugged in. Connect the phone to a wall charger rated at least 5V/1A and leave it for 20–30 minutes without pressing any buttons; the charge IC trickle-charges the cell back above the BMS re-enable threshold, typically around 2.8V, at which point the phone will boot normally.