About this replacement
Oppo Realme Pad Mini — 3.87V Li-Polymer Replacement Battery (BLT003)
This is a 3.87V, 6200mAh (23.99Wh) Li-Polymer battery for the Realme Pad Mini tablet. It fits the Wi-Fi, 4G, and LTE variants. It replaces part number BLT003 using the original connector and dimensions (129.00 x 107.20 x 3.00mm).
- Realme Pad Mini variant compatibility: The Wi-Fi, 4G, and LTE models all share the same BLT003 cell, connector pinout, and BMS communication protocol — one battery services all three without modification.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the Realme Pad Mini platform. The BMS accepted the new cell on first connection and reported state-of-charge within normal parameters after a full calibration cycle.
- Fuel gauge recalibration after swap: After fitting this battery, run the tablet down to automatic shutoff, then charge uninterrupted to 100%. The fuel gauge IC calibrates against the old cell's data — one complete cycle resets it against the new cell and clears inaccurate percentage readings.
Tablet shutting down at 15–25% remaining after battery replacement
The Realme Pad Mini's display and simultaneous Wi-Fi activity create a combined load spike that hits the battery hard in the lower state-of-charge range. At around 3.5V cell voltage, the BMS interprets the voltage sag from that combined draw as a critically low condition and cuts power before the fuel gauge reaches 0%. The fix is a full discharge-to-shutoff cycle followed by a complete uninterrupted charge. After that single calibration cycle, the fuel gauge IC maps the new cell's actual voltage curve and the shutdowns stop.
Fast charging unavailable after fitting the BLT003 replacement
Realme's proprietary fast charge protocol requires at least one completed charge handshake cycle before the charge IC trusts a new cell's negotiation data. If fast charging doesn't appear immediately after installation, this is expected behaviour — not a fault with the battery. Plug in using the original Realme adapter, allow one full charge to 100%, and disconnect. On the next charge session the adapter and charge IC should complete the handshake and fast charge will resume.