Product Name: Replacement Battery for OPPO A3 / F7 – BLP661
Compatible Models: OPPO A3 (CPH1853), OPPO F7 (CPH1821)
Battery Model: BLP661
Battery Type: Lithium‑polymer
Function: Replace aged, swollen, or non‑working battery – restores battery life and device runtime
Capacity: Original capacity match (approx. 3400 mAh)
Voltage: 3.85V
Included: Complete battery with pre‑attached BMS flex cable
Installation: Direct replacement – no soldering required
High quality aftermarket with dual IC safety system for maximum protection, stable and secure charging, smart overheat detection, protection against power surges, consistent power output, and extra safety assurance for used or unknown part repairs