About this replacement
Apple iPad Air 2 / iPad 6 — 3.8V Li-Polymer Replacement Battery (A1547)
This 3.8V, 7300mAh lithium-polymer battery is a direct cell replacement for the Apple iPad Air 2 and iPad 6. It fits models A1566 and related variants across the WiFi and cellular configurations. Swap it in when the original cell no longer holds a useful charge or fails to power on at all.
- iPad Air 2 and iPad 6 platform fitment: Both generations share the A1547 cell format — same connector pinout, same BMS handshake voltage, and the same 186.50 × 130.00 × 3.50mm footprint inside the adhesive-bonded chassis.
- Bench tested on actual hardware: We cycled this cell through charge and discharge on iPad Air 2 hardware. The BMS accepted charge negotiation on the first cycle, held voltage stable across display and WiFi combined load, and showed no thermal events through a full depletion run.
- Fuel gauge reset after installation: After fitting this cell, run one full discharge to automatic shutoff, then charge uninterrupted to 100%. This gives the iPad's fuel gauge IC a calibration reference against the new cell and clears the inaccurate percentage display that almost always appears after a swap.
iPad Air 2 shutting down at 15–25% remaining after battery replacement
This happens because the fuel gauge IC is still calibrated to the old cell's voltage curve. The new cell hits a voltage cliff under combined display and WiFi load at a point the gauge hasn't mapped yet — so the iPad reads it as a hard cutoff. It's not a faulty cell. One full discharge-to-shutdown followed by an uninterrupted charge to 100% resets the reference. After that cycle, the gauge tracks the new cell's curve accurately and the early shutdowns stop.
Fast charging unavailable on iPad Air 2 after battery swap
The iPad's charge IC runs a USB-PD negotiation check on the first accepted charge cycle after a new cell is fitted. Until that cycle completes, the device may fall back to standard 5W charging and ignore higher-wattage adapters. Plug in a USB-PD charger and let it complete one uninterrupted charge from low to 100%. After that first full cycle, USB-PD negotiation re-establishes and fast charging becomes available again.