BLP865 Oppo K9 Pro Replacement Battery 3.87V 4400mAh PT40 the BMS trips a deep-discharge

the BMS trips a deep-discharge protection latch and blocks both charging and power-on

Place the battery on a standalone Ni-MH charger first to bring it above 2

COBE Cardiovascular Stockert S5 Modular Heart/Lung Machine Replacement Battery Set

and voltage held above the low-cutoff threshold throughout the full discharge curve

This is the charge IC applying a deliberate ceiling on an uncalibrated cell — not a defective battery

BLP865 Oppo K9 Pro Replacement Battery 3.87V 4400mAh PT40 the BMS trips a deep-dischargeOppo K9 Pro Series 3. 87V Li Polymer Replacement Battery (BLP865) The BLP865 is a 3. 87V, 4400mAh (17. 03Wh) lithium polymer cell that fits the Oppo K9 Pro, K9 Pro 5G, K9 Pro 5G 2021 Standard Edition, and PEYM00. It replaces the original cell when capacity has dropped from repeated charge cycles or the battery no longer holds a usable charge. Swapping this cell restores the phone to factory power capacity without replacing the entire handset. K9 Pro