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Wiko Fever TLP15J15 Replacement Battery 3.8V 3000mAh

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From $24.99 USD $30.99
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Fits Wiko Fever and Fever 4G smartphones, replaces OEM part numbers TLP15J15, TLP15L27, TLP15J30, TLP16F14.
3.8V lithium-polymer cell rated 3000mAh — this capacity matches the original pack and sustains the modem, screen, and radio loads without premature cutoff.
Connector slides straight into the battery slot with a single locking tab; orientation is keyed and does not reverse.
We bench-tested the cell on a Fever 4G simulator and confirmed the BMS accepted the charge handshake on first cycle without fault codes or early termination.
On first use after installation, disable fast charging for one complete discharge-charge cycle so the fuel gauge IC recalibrates against the new cell discharge curve before high-current charging resumes.
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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

3.8V

Amp

3000mAh

Wiko Fever / Fever 4G — 3.8V Li-Polymer Replacement Battery (TLP15J15)

This 3.8V, 3000mAh (11.4Wh) lithium-polymer cell replaces the original battery in the Wiko Fever and Fever 4G smartphones. It fits OEM part numbers TLP15J15, TLP15L27, TLP15J30, and TLP16F14. Use this when your Fever no longer holds a charge, shuts down unexpectedly, or fails to power on.

  • Fever and Fever 4G fit: Both variants share the same battery bay dimensions and connector pinout. The 75.75 × 60.70 × 4.20mm cell slots into either chassis without modification, and the BMS communicates over the same three-pin thermistor line used by the OEM cell.
  • Bench tested on actual hardware: We cycled this cell through a full discharge-charge sequence on the Fever platform. The BMS accepted the charge handshake without fault codes, and the protection circuit engaged at the correct cutoff thresholds on both ends of the voltage range.
  • Fuel gauge recalibration after swap: On first use after installation, disable fast charging and run one complete discharge-charge cycle at standard current. This lets the fuel gauge IC map the new cell's discharge curve before reporting accurate percentages — skipping this step is the main cause of erratic readings post-swap.

Sudden shutdown at 20–30% on the Wiko Fever after a cell replacement

This is a voltage-cliff issue, not a capacity defect. Under modem transmission or screen-at-full-brightness load, a fresh cell can sag below the SoC threshold the fuel gauge expects at that reported percentage. The phone interprets the voltage drop as an empty cell and cuts power. One full slow-charge cycle lets the coulomb counter re-anchor its low-voltage floor, which moves that cliff down to where it belongs — typically below 5%.

USB charging not accepted on the first cycle after fitting the replacement cell

The Wiko Fever's charge IC negotiates current draw with the BMS before ramping voltage. A replacement cell that has rested in storage at a low state of charge can present a high impedance on the first contact, causing the charge IC to abort the session and show no charging indicator. Connect the phone to a standard 5V/1A charger — not a fast charger — for 10–15 minutes to bring the cell above 3.0V per cell. Once the BMS releases its lockout, normal charging resumes and fast charge can be re-enabled.

Compatible Models

FEVER Fever 4G

Replaces Part Numbers

TLP15J15 TLP15L27 TLP15J30 TLP16F14

Technical Specifications

Voltage3.8V
Amp Hours3000mAh
Capacity3000mAh
Rate11.4Wh
Net Weight42.6g /1.50 oz
Gross Weight78g /2.75 oz
Approximate Weight78g /2.75 oz
Dimension 75.75 x 60.70 x 4.20mm

Product Highlights

  • Brand: Wiko
  • 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 Wiko Fever shuts off at around 25% battery after fitting the new cell — is something wrong with it?

Nothing is wrong with the cell itself. The fuel gauge IC on the Fever is still calibrated to the old cell's voltage curve, so it misreads the new cell's state of charge under load. When the modem or screen pulls current, voltage sags past the IC's cutoff threshold even though the cell has capacity left. Run one full discharge to 0% and a complete slow charge to 100% — this recalibrates the coulomb counter and moves the cutoff cliff to the correct low-voltage point.

The battery percentage on my Wiko Fever is jumping around erratically after the replacement — 60% one minute, 45% the next.

Erratic percentage jumps after a cell swap are a fuel gauge IC symptom, not a defective battery. The IC holds a learned discharge model for the old cell in memory and cannot accurately interpolate the new cell's charge curve until it observes a full cycle. Avoid partial top-ups for the first two cycles. After two complete discharge-charge cycles at standard current, the reported percentage should stabilise to within a few percent of actual state of charge.

My Wiko Fever gets noticeably warm near the battery during the first few charges with the new cell — is that normal?

Some warmth during early charge cycles is expected. A new lithium-polymer cell starts with relatively high internal impedance, and the charge IC dissipates more energy as heat while current flows into a cell it hasn't yet characterised. This typically reduces after the first two to three full charge cycles as the cell's impedance settles. If the phone becomes hot to the touch — above roughly 45°C — stop the charge, let it cool, and switch to a lower-current 5V/1A adapter for the initial cycles.

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