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BLP671 Oppo Find X Replacement Battery 3.85V 3600mAh

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From $26.99 USD $33.99
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Fits Oppo Find X and Find X Dual SIM; replaces OEM battery BLP671.
3.85V and 3600mAh capacity restores full charge cycles to the Find X's AMOLED display and processor load.
Connector slides straight into the battery slot with a single locking tab; orientation marked on the cell.
We bench-tested the BMS against Oppo's fast-charge protocol — fuel gauge IC accepted the new cell without lockout.
On first charge after installation, disable fast charging for one complete discharge-charge cycle so the coulomb counter recalibrates to the new cell's discharge curve before USB-PD pushes current into an uncalibrated pack.
Delivery time

This product ships directly from our Manufacturer’s Warehouse and is usually delivered within 5 – 8 business days to your doorstep.

Discount: As a thank you for your patience, enjoy 5% off on your order
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Battery Care Tips

🔹 Getting Started

Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.

🔹 Keep It Healthy

Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.

Delivery and Shipping

🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.

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⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.

🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

3.85V

Amp

3600mAh

Oppo Find X Series — 3.85V Li-Polymer Replacement Battery (BLP671)

The BLP671 is a 3.85V, 3600mAh (13.86Wh) lithium-polymer cell that fits the Oppo Find X, Find X Dual SIM, Find X Dual SIM TD-LTE, and PAFT00. It replaces a degraded or failed original cell to restore full display, processor, and wireless operation. Dimensions are 61.12 × 60.30 × 5.76mm — confirm clearance before installation.

  • Find X platform fit: All listed Find X variants share the same battery bay geometry, connector pinout, and BMS handshake protocol — one cell covers the entire group without modification.
  • Bench tested on actual hardware: We cycled this cell through charge and discharge on a Find X unit, confirming BMS communication, charge acceptance across the full 3.85V nominal curve, and clean cutoff at low-cell voltage.
  • Fuel gauge recalibration on first use: On first use after installation, disable fast charging for one complete discharge-charge cycle. This lets the fuel gauge IC recalibrate against the new cell's discharge curve before high-current charging pushes current into an uncalibrated cell.

Why the Find X reports wrong battery percentage after a cell swap

The Find X uses a coulomb-counter fuel gauge IC that builds its capacity model against the original cell's discharge curve over hundreds of cycles. When a new cell goes in, the IC is still running the old model. The percentage readout can appear stuck, jump erratically, or plateau for long periods. One full uninterrupted discharge-to-charge cycle — without fast charging — lets the IC reset its reference table against the new cell.

Sudden shutdown at 20–30% on the replacement cell

This happens when the fuel gauge IC has not yet mapped the new cell's voltage cliff — the point where cell voltage drops sharply under modem or screen load. The phone reads 25% state of charge but the actual cell voltage under load dips below the shutdown threshold. It is not a faulty cell; it is a calibration gap. Run one full cycle without interruption and the IC will anchor its low-voltage cutoff to the correct point on the new discharge curve.

Compatible Models

Find X Find X Dual SIM Find X Dual SIM TD-LTE PAFT00 PAFM00

Replaces Part Numbers

BLP671

Technical Specifications

Voltage3.85V
Amp Hours3600mAh
Capacity3600mAh
Rate13.86Wh
Net Weight50.2g /1.77 oz
Gross Weight75g /2.65 oz
Approximate Weight75g /2.65 oz
Dimension 61.12 x 60.30 x 5.76mm

Product Highlights

  • Brand: Oppo
  • Manufacturer: CS
  • Series: X-Longer
  • Color: Black
  • Product Type: Li-Polymer
  • Battery Type: Li-Polymer
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My Oppo Find X shuts off suddenly around 25% — is something wrong with the replacement cell?

This is a fuel gauge calibration issue, not a defective cell. The coulomb-counter IC is still referencing the old cell's voltage curve, so it misreads the actual charge remaining when load spikes from the modem or display. The cell voltage drops below the shutdown threshold before the gauge catches up. Run one full uninterrupted discharge down to automatic shutoff, then charge to 100% without fast charging enabled — the IC will remap the cutoff point correctly.

Fast charging stopped working after I fitted the BLP671 — the phone only trickle charges now

On the first cycle after a cell swap, the Find X charge IC can refuse to negotiate the proprietary fast-charge protocol until it has validated the new cell's impedance profile. This is a BMS handshake behaviour, not a hardware fault. Charge the phone once at standard speed through a full cycle. On the second charge, reconnect the original fast charger — the protocol should negotiate normally at that point.

The phone won't power on at all after the replacement battery sat in storage for a few weeks before installation

Lithium-polymer cells self-discharge in storage, and if the BLP671 dropped below approximately 2.5V per cell, the BMS will have entered lockout mode to prevent damage. Connect the phone to a low-current 5V charger — not a fast charger — and leave it for 20–30 minutes without attempting to power it on. Once the cell recovers above the BMS re-enable threshold, the phone will boot normally.

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Oppo Find X Replacement Battery, 3.85V, 3600mAh, Li-Polymer 1

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