When searching for a high-capacity battery like the BLP865 for the OPPO K9 Pro 5G (model PEYM00), it's important to make sure you're purchasing from a trusted supplier to ensure both compatibility and quality. The BLP865 is the original battery used in this model, and it comes in a 4500mAh capacity.

Factors to Consider:

• Capacity: Ensure that the battery is of the correct capacity (4500mAh) and voltage to match your phone’s specifications.

• Warranty: Check if the battery comes with a warranty, especially for wholesale purchases.

• Shipping and Return Policies: Verify the seller’s policies on returns, exchanges, and shipping to avoid any future issues.

If you’re looking for the best deals, you might want to compare prices from various suppliers, but always prioritize quality and compatibility over price alone to avoid potential damage to your phone.