About this replacement
Apple iPad A2898 / A2899 / A2900 / A2903 — 3.76V Li-Polymer Replacement Battery (0090S)
This 3.76V, 9700mAh (36.47Wh) lithium-polymer cell replaces the internal battery in Apple iPad models A2898, A2899, A2900, and A2903. It fits the standard battery bay on these tablets with no modification to the housing or connectors. Swap it in when the original cell no longer holds a charge or causes unexpected shutdowns.
- A2898–A2903 compatibility: These four model numbers share the same battery bay dimensions, connector pinout, and BMS handshake protocol — all four draw from the same 3.76V cell architecture, so one cell covers all variants without adaptation.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on iPad hardware. The BMS accepted charge negotiation without error flags, and protection circuits tripped correctly at both high and low voltage thresholds.
- Post-installation calibration: After fitting this cell, run the tablet down to automatic shutoff, then charge uninterrupted to 100% without using it. This resets the fuel gauge IC against the new cell's actual capacity curve and clears the percentage drift that almost always appears after a swap.
iPad shutting down at 15–25% battery remaining after replacement
This happens because the fuel gauge IC is still calibrated to the old cell's voltage curve. The new cell hits a steeper voltage drop under combined display and Wi-Fi load than the IC expects — so it interprets a voltage cliff as an empty battery and forces shutdown. The fix is one full discharge-to-cutoff cycle followed by a full uninterrupted charge. After that cycle, the gauge recalibrates to the new cell and the early shutdowns stop. If shutdowns persist past 20%, check that the connector is fully seated — a partial connection raises internal resistance and exaggerates the voltage sag.
Fast charging not available after battery swap
Apple's USB-PD negotiation requires at least one completed charge cycle before the charge IC on a new cell accepts higher current without dropping back to standard 5W charging. This is a protection behaviour in the cell's BMS, not a fault in the replacement battery. Charge the tablet once from low to 100% at standard rate using Apple's own cable and adapter. After that cycle completes, USB-PD negotiation resumes normally and fast charge becomes available again.