H11236 Haier E617 Replacement Battery 3.7V 1500mAh Li-ion

Haier E617 / I617 / E611 / I618 — 3.7V Li-ion Replacement Battery (H11236)

This is a 3.7V, 1500mAh Li-ion cell replacement for the Haier E617, I617, E611, and I618 smartphones. It carries OEM part number H11236 and measures 68.26 × 51.72 × 4.15 mm — matching the original cell footprint. Swap it in when the original cell no longer holds a usable charge through a normal day of calls and messaging.

• E617 / I617 / E611 / I618 compatibility: All four models share the same battery bay dimensions, 3.7V nominal voltage rail, and H11236 connector pinout. The BMS handshake protocol is identical across this family, so one cell serves all four without modification.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the bench and confirmed the BMS accepted the new cell without triggering an over-voltage or over-temperature fault. The protection circuit engaged correctly at both low and high voltage cutoff thresholds.
• Fuel gauge recalibration on first use: On first use after installation, disable fast charging and run one complete discharge-charge cycle at standard rate. This lets the fuel gauge IC map the new cell's discharge curve before the OS starts reading state-of-charge — skipping this step causes erratic percentage jumps in the status bar.

Why the Haier E617 reports wrong battery percentage after a cell swap

The fuel gauge IC on these Haier models uses a coulomb counter calibrated to the original cell's discharge curve. When a new cell goes in, the IC has no reference data for it, so percentage readings drift — often showing 100% for an extended period then dropping sharply. One complete discharge-to-shutdown followed by an uninterrupted charge to full gives the IC enough data to rebuild its internal model. After that cycle, percentage readings stabilise and track accurately under screen and modem load.

Sudden shutdown at 20–30% remaining on the replacement cell

This happens when the cell voltage drops below the modem's or display's minimum rail requirement under load — even though the OS still reads 20–30% remaining. A new cell with an uncalibrated fuel gauge IC will report a higher state-of-charge than the actual voltage supports. Under burst load — an incoming call, screen-on event, or background sync — the voltage sags past the cutoff threshold and the phone shuts down. Run one full discharge cycle at low screen brightness with mobile data active, then charge uninterrupted to 4.2V to anchor the coulomb counter to real-world load conditions.