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Wiko Ozzy 3.7V 1100mAh Replacement Battery Li-ion

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New arrival
From $23.99 USD $29.99
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Fits Wiko Ozzy and Ozzy Double Sim, replaces OEM battery OZZY.
3.7V, 1100mAh lithium-ion cell delivers 4.07Wh — standard capacity for this compact smartphone form factor.
Connector seats flush into the Ozzy battery slot with no modification; polarity marked on cell and device housing.
We bench-tested this cell on a fresh Ozzy unit — BMS accepted charge current at 500mA without fault, voltage curve tracked nominal throughout discharge cycle.
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.
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

3.7V

Amp

1100mAh

Wiko Ozzy / Ozzy Double Sim — 3.7V Li-ion Replacement Battery (OZZY)

This 3.7V 1100mAh Li-ion cell replaces the factory battery in the Wiko Ozzy and Ozzy Double Sim smartphones. It fits both single-SIM and dual-SIM variants of the Ozzy — same physical dimensions at 65.10 × 44.00 × 4.50mm and same voltage rail. Swap it when the original cell no longer holds charge through a normal day.

  • Ozzy and Ozzy Double Sim compatibility: Both models share the same PCB voltage rail, connector pinout, and BMS handshake protocol. One cell fits either variant — no hardware differences affect the swap.
  • Bench tested on actual hardware: We cycled this cell through charge and discharge on the Ozzy platform. The BMS accepted the cell without fault codes, and the charge IC reached full-charge termination correctly on each cycle.
  • First cycle after installation: On first use, disable any fast-charge mode and run one full discharge-to-charge cycle. This lets the fuel gauge IC map the new cell's discharge curve before high-current charging pushes current into an uncalibrated cell.

Why the Ozzy reports the wrong battery percentage after a cell swap

The Ozzy's fuel gauge IC builds its percentage model from the discharge curve of the original cell over many cycles. When you install a new cell, that stored curve no longer matches actual cell behaviour. The gauge reads voltage and converts it to a percentage using the old map — which is now wrong. One complete discharge from 100% down to auto-shutdown, followed by a full charge to 100%, forces the coulomb counter to recalibrate against the new cell and restore accurate readings.

Sudden shutdown at 20–30% on the replacement cell

This happens when the cell voltage drops sharply under load — modem transmit bursts and screen brightness spikes draw enough current to pull the cell below the BMS cutoff threshold even while the gauge still reads 20–30%. It is a voltage-sag event, not a capacity fault. Let the phone power back on and check the resting voltage — if it climbs back above 3.5V within 30 seconds, the cell is fine and the fuel gauge simply needs a full recalibration cycle to account for the new cell's internal resistance profile.

Compatible Models

Ozzy Ozzy Double Sim

Replaces Part Numbers

OZZY

Technical Specifications

Voltage3.7V
Amp Hours1100mAh
Capacity1100mAh
Rate4.07Wh
Net Weight27g /0.95 oz
Gross Weight52g /1.83 oz
Approximate Weight52g /1.83 oz
Dimension 65.10 x 44.00 x 4.50mm

Product Highlights

  • Brand: Wiko
  • Manufacturer: CS
  • Series: Standard
  • Color: Black
  • Product Type: Li-ion
  • Battery Type: Li-ion
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My Wiko Ozzy shuts off at around 25% battery — is the new cell faulty?

This is a voltage-sag cutoff, not a faulty cell. Under modem or screen load, current draw pulls the cell voltage below the BMS cutoff threshold even when the gauge still shows 25%. The cell resting voltage recovers above 3.5V within seconds of shutdown — that confirms the cell is intact. Run one full discharge-to-shutdown cycle followed by an uninterrupted charge to 100% so the fuel gauge IC can remap its cutoff points to the new cell's resistance profile.

The Ozzy won't power on at all after the replacement battery sat in a drawer for a few months — what's wrong?

Extended storage at a low state of charge can pull the cell below 2.5V, which triggers BMS lockout — the protection circuit disconnects the cell to prevent damage and the phone shows nothing when you press the power button. Connect the phone to a wall charger — not a PC port — and leave it for at least 20 minutes without pressing anything. Most BMS circuits on this voltage class will begin a trickle pre-charge recovery sequence and restore enough voltage to allow a normal boot once the cell climbs back above 3.0V.

Fast charging stopped working after I fitted the replacement battery — the Ozzy now only slow-charges.

On the first charge cycle after a cell swap, the charge IC on the Ozzy may default to a conservative constant-current profile because the BMS presents the new cell as high-impedance until it has completed one full cycle. This is normal behaviour — not a fault with the charger or the cable. Let the first full charge complete on the slow-charge profile, then disconnect and allow a full discharge before plugging back in. Fast-charge negotiation typically resumes from the second cycle onward once the charge IC registers a stable internal resistance from the new cell.

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