Asus ZenFone V Live Compatible Battery C11P1702 3.85V 2700mAh

Asus ZenFone V Live — 3.85V Li-Polymer Replacement Battery (C11P1702)

This is a 3.85V, 2700mAh Li-Polymer replacement battery for the Asus ZenFone V Live, ZenFone V Live LTE, V500KL, and A009. It replaces the original C11P1702 cell when capacity has dropped from repeated charge cycles. The battery connects to the same board-mounted flex connector as the factory cell.

• V500KL and A009 platform fit: These model numbers share the same PCB layout, connector pitch, and BMS handshake protocol — all drawing from the same 3.85V rail. One cell covers all variants without modification.
• Bench tested on actual hardware: We ran the C11P1702 replacement through a full charge cycle on the V500KL board. The charge IC accepted the cell, BMS communication initialized correctly, and the fuel gauge IC began tracking within the first discharge pass.
• First-cycle fast charge protocol: On first use after installation, disable fast charging for one complete discharge-charge cycle. This lets the fuel gauge IC recalibrate against the new cell's discharge curve before high-current charging pushes current into an uncalibrated cell — which can cause premature charge termination or erratic percentage readings.

Sudden shutdown at 20–30% on the replacement cell

This happens because the fuel gauge IC is still calibrated to the old cell's discharge curve. The new cell has a different voltage-versus-capacity slope, so the gauge reads 25% while actual cell voltage has already hit the modem's cutoff threshold. Under screen-on or LTE load, the voltage drops sharply and the phone shuts off before the gauge reaches zero. Run one full discharge to below 5%, then charge to 100% uninterrupted — this forces the coulomb counter to re-anchor its endpoints to the new cell.

Phone reports wrong battery percentage after cell swap

The fuel gauge IC stores learned capacity data from the old cell in non-volatile memory. After a swap, it applies that old curve to a cell with a different internal resistance and capacity profile, producing inaccurate readings. Percentage may jump several points or flatline at a fixed number. A single full discharge-to-shutdown followed by an uninterrupted charge to 100% resets the learned parameters — after that cycle, percentage tracking stabilises to within a few percent of actual.