Asus C11P1309 Fonepad Note 6 Compatible Battery 3.8V 3200mAh

Asus Fonepad Note 6 / ME560CG — 3.8V Li-Polymer Replacement Battery (C11P1309)

This 3.8V, 3200mAh lithium-polymer cell replaces the original C11P1309 battery in the Asus Fonepad Note 6, Fonepad Note FHD6, ME560CG, and Padfone Note 6. It fits the 67.10 × 69.40 × 5.00mm cavity and connects to the same five-pin flex harness as the factory cell. Swap this in when the original cell no longer holds charge through a full day of calls and screen use on the 6-inch display.

• ME560CG platform fit: The ME560CG, Fonepad Note 6, and FHD6 variants all share the same battery bay geometry, connector pinout, and BMS handshake protocol — which is why one cell covers the entire line. The voltage rail at 3.8V nominal matches what the charge IC expects across all board revisions.
• Bench tested on actual hardware: We cycled this cell through full discharge and recharge on the ME560CG mainboard. The BMS accepted the cell without a fault flag, charge current stepped down correctly at 4.2V, and the coulomb counter latched without manual reset.
• Fuel gauge recalibration after install: 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 into an uncalibrated state — preventing erratic percentage readings from the first week of use.

Sudden shutdown at 20–30% on the Fonepad Note 6

The ME560CG runs a combined modem and 6-inch IPS display load that pulls sharp current spikes. An aged or degraded cell cannot sustain terminal voltage under that combined draw, so it hits the BMS undervoltage threshold even while the OS still reports 20–30% remaining. The phone interprets the voltage cliff as a hard cutoff and shuts down. Fitting a new cell with healthy internal resistance eliminates the sag — but the fuel gauge IC still needs one full discharge cycle to map the new voltage curve before percentage readings stabilise.

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

Li-polymer cells left discharged in storage self-discharge below 2.5V per cell, which triggers a BMS lockout to prevent thermal runaway during recovery charging. The phone shows nothing on screen — no charging animation, no boot. Connect the device to a wall charger rated at least 5V/1A and leave it undisturbed for 20–40 minutes; the BMS trickle-charges the cell back above its recovery threshold before allowing normal charge current. If the screen still shows nothing after 45 minutes, measure voltage at the battery terminals — below 2.0V means the cell has deep-discharged past recovery and needs replacement.