About this replacement
Oppo Find 7 / Find 7a (X9007 / X9006) — 3.7V Li-ion Replacement Battery (BLP569 / BLP575)
This is a 3.7V, 2100mAh Li-ion cell replacing the BLP569 and BLP575 batteries fitted to the Oppo Find 7 and Find 7a smartphones. It fits the X9007 and X9006 variants along with the wider Find 7 series. Voltage and cell dimensions match the original: 79.30 × 55.93 × 5.02mm.
- Find 7 and Find 7a cross-compatibility: The Find 7 (X9007) and Find 7a (X9006) share the same battery bay dimensions and connector pinout. Both BLP569 and BLP575 part numbers are interchangeable across this series because Oppo used identical voltage rails and connector housings on both SKUs.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on Find 7 series hardware. The BMS handshake completed correctly, charge IC accepted the cell without flagging an error, and cutoff voltage triggered at the expected threshold at both low and high states of charge.
- Fuel gauge recalibration on first use: On first use after installation, disable VOOC or any fast-charge mode for one complete discharge-charge cycle. The fuel gauge IC on the Find 7 calibrates its coulomb counter against the new cell's discharge curve — skipping this step causes the percentage reading to drift or jump erratically in the first few days.
Sudden shutdown at 20–30% on the Find 7 after a cell swap
The Find 7's Snapdragon 801 platform draws a sharp current spike when LTE switches between bands or the display hits full brightness. A new cell with an uncalibrated fuel gauge IC can report 25% remaining while the actual resting voltage has already dropped near the BMS cutoff threshold. The BMS reads true cell voltage — not the OS percentage — and trips the cutoff to protect the cell. One full discharge down to automatic shutdown, followed by a full charge to 100%, lets the coulomb counter re-anchor to the actual cell capacity and eliminates most premature shutdowns.
Phone warm near the battery during the first few charges after replacement
A new cell starts with higher internal impedance than a broken-in cell. The charge IC on the Find 7 pushes current at its standard rate regardless, and higher impedance means more energy lost as heat inside the cell during those first cycles. This is normal and tapers off after three to five full cycles as the cell's internal resistance settles. If warmth persists beyond five cycles or the phone becomes hot rather than warm, check that the battery connector is fully seated — a partial connection raises contact resistance and keeps impedance artificially high throughout charging.