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Huawei Nova 5 HB396589ECW Replacement Battery 3.85V 3400mAh

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From $25.99 USD $31.99
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Fits Huawei Nova 5 and Nova 5 Pro models, replacing OEM battery HB396589ECW.
Delivers 3.85V at 3400mAh capacity — restores full charge cycles on devices reporting degraded runtime after hundreds of charge cycles.
Connector seats flush into the original battery slot with standard Huawei polymer cell orientation and locking tab alignment.
We bench-tested this cell on a Nova 5 motherboard; the BMS accepted the pack on first insertion with no fault codes or voltage cutoff anomalies.
On first use after installation, disable fast charging for one complete discharge-charge cycle to let the fuel gauge IC recalibrate against the new cell discharge curve.
Delivery time

This product ships directly from our Manufacturer's Warehouse and is usually delivered within 7 – 10 business days to your doorstep.

Discount: As a thank you for your patience, enjoy 5% off on your order
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Fresh Battery, Worth the Wait

To provide the highest-quality replacement battery, we ship this battery directly from the manufacturer rather than from aging warehouse inventory. This means delivery may take a little longer, but it helps ensure you receive a fresh battery with better performance, a longer lifespan, and greater reliability.

Estimated delivery: 7–10 business days
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By continuing with your purchase, you acknowledge and agree to the estimated 7–10 business day delivery timeframe.
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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.

Disclaimer

⚠️ 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

3400mAh

Huawei Nova 5 / Nova 5 Pro — 3.85V Li-Polymer Replacement Battery (HB396589ECW)

This is a 3.85V, 3400mAh (13.09Wh) Li-Polymer cell for the Huawei Nova 5 and Nova 5 Pro smartphones, including variants SEA-TL00 and SEA-TL10. It replaces part number HB396589ECW and fits the original battery bay without modification. Swap it in when the original cell can no longer hold a charge through a normal day of use.

  • Nova 5 and Nova 5 Pro compatibility: Both handsets share the same battery footprint, connector pinout, and BMS handshake protocol. The HB396589ECW part number covers the full variant range — hardware differences between SEA-TL00 and SEA-TL10 do not affect battery fitment or charge IC communication.
  • Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the Nova 5 platform. The BMS negotiated charge current correctly, protection circuits triggered at the expected voltage thresholds, and the fuel gauge IC read cell state without error flags.
  • 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 its coulomb counter against the new cell's actual discharge curve before high-current charging pushes current into an uncalibrated cell.

Sudden shutdown at 20–30% on the Nova 5 after a cell swap

This happens because the fuel gauge IC is still running the discharge curve it learned from the old, degraded cell. When the new cell's actual voltage drops under modem or display load, the IC hasn't mapped that region accurately yet and triggers an emergency shutdown. The phone reads 20–30% but the cell is already below the safe floor in the IC's outdated model. One full discharge to around 3.4V under normal load, followed by a full charge, forces the coulomb counter to relearn the new cell's curve and eliminates the false cutoff.

Huawei fast charging not activating after replacement

Huawei's proprietary fast charge protocol requires the charge IC to confirm BMS parameters before switching to high-current mode. On the first cycle with a new cell, the IC defaults to standard 5V charging while it validates the new cell's impedance profile. This is normal behaviour — it is not a fault with the replacement battery or the charger. After one complete standard charge cycle, the fast charge handshake re-establishes and the phone returns to full charging speed on the next plug-in.

Compatible Models

Nova 5 Nova 5 Pro SEA-TL00 SEA-TL10 SEA-AL00 SEA-AL10

Replaces Part Numbers

HB396589ECW

Technical Specifications

Voltage3.85V
Amp Hours3400mAh
Capacity3400mAh
Rate13.09Wh
Net Weight50.4g /1.78 oz
Gross Weight85g /3.00 oz
Approximate Weight85g /3.00 oz
Dimension 87.60 x 64.50 x 3.70mm

Product Highlights

  • Brand: Huawei
  • 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 Huawei Nova 5 won't turn on at all after the replacement battery sat in a drawer for a few months — is it dead?

The BMS locks out when cell voltage drops below approximately 2.5V during storage, cutting all output to protect the cell from permanent damage. Connect the phone to a charger and leave it for at least 20–30 minutes before attempting to power on — the charge IC needs time to trickle-charge the cell above the BMS recovery threshold. If the screen remains dark, try a different USB-C cable and a wall adapter rather than a PC port, since low-amperage USB ports may not deliver enough current to wake the BMS. Once the cell reaches around 3.0V, the BMS releases the lockout and the phone boots normally.

The battery percentage on my Nova 5 keeps jumping around erratically — it went from 45% straight to 12% without warning.

Erratic percentage jumps mean the fuel gauge IC's coulomb counter is recalibrating against the new cell's discharge curve, which differs from the degraded cell it was previously tracking. The IC interpolates state-of-charge from a stored curve, and until it maps the new cell accurately, the displayed percentage can jump when actual voltage crosses a region the old curve modelled incorrectly. Run two complete discharge-charge cycles — discharge the phone under normal use until it shuts itself off, then charge uninterrupted to 100% — without using fast charging during those cycles. After two full cycles the fuel gauge stabilises and percentage readout becomes accurate.

The Nova 5 gets noticeably warm near the battery during the first few charges after replacement — is the new cell faulty?

A new Li-Polymer cell has higher internal impedance than a cell that has completed its formation cycles, so the charge IC dissipates slightly more energy as heat during early charging sessions. This is a normal characteristic of a fresh cell, not a sign of a fault. The warmth reduces after three to five charge cycles as impedance settles. If the phone becomes hot to the touch — rather than just warm — during any charge session, disconnect immediately and check that you are using the original Huawei adapter, since third-party chargers can misread the current limit negotiation and over-drive the charge IC.

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