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Spice C5300 Compatible Battery SIB-11 3.7V 1200mAh

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From $23.99 USD $29.99
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Fits Spice C5300, S3636, QT-52, M6464 smartphones; replaces OEM SIB-11 and SIB-16 battery packs.
3.7V lithium-ion cell rated 1200mAh delivers 4.44Wh—sufficient for standard smartphone modem and display loads.
Connector slots vertically into the battery cavity; no locking tab engagement required for this form factor.
We bench-tested against a discharged C5300 unit; BMS accepted charge immediately with no voltage regulation faults detected.
On first use after installation, disable fast charging for one complete discharge-charge cycle—the fuel gauge IC must recalibrate against the new cell's discharge curve before high-current charging prevents proper calibration.
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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

1200mAh

Spice C5300 / S3636 / QT-52 / M6464 — 3.7V Li-ion Replacement Battery (SIB-11 / SIB-16)

This is a 3.7V, 1200mAh Li-ion replacement battery for the Spice C5300, S3636, QT-52, and M6464 smartphones. It replaces OEM part numbers SIB-11 and SIB-16. Dimensions are 53.00 × 33.90 × 5.70mm — confirm your original battery measurements before fitting.

  • C5300, S3636, QT-52, and M6464 compatibility: These four models share the same battery bay dimensions, connector pin-out, and 3.7V nominal voltage rail. The BMS on each device accepts the same cell chemistry and charge termination voltage, which is why one part number covers all four.
  • Bench tested on actual hardware: We cycled this cell through charge and discharge on the bench. The BMS accepted the cell without fault flags, reached full charge termination at 4.2V, and held voltage flat under screen-on load.
  • Fuel gauge recalibration on first cycle: On first use after fitting, run one full discharge to auto-shutoff, then charge uninterrupted to 100%. This gives the phone's coulomb counter a clean reference curve against the new cell before it starts reporting percentage readings to the OS.

Why the Spice C5300 reports wrong battery percentage after a cell swap

The fuel gauge IC on the C5300 builds its percentage model against the discharge curve of the old cell. When a new cell goes in, that stored curve no longer matches actual cell behaviour. The IC interpolates against stale data and reports inaccurate state-of-charge figures until it recalibrates. One full discharge-to-shutoff followed by an uninterrupted charge cycle overwrites the old curve and re-anchors the gauge to the new cell.

Sudden shutdown at 20–30% on the replacement cell

This happens when the cell voltage drops below the modem or display load threshold faster than the fuel gauge predicted — a voltage cliff the uncalibrated IC did not anticipate. Under peak modem transmit or screen-on current, a fresh cell not yet profiled by the coulomb counter can sag below the SoC cutoff point while the display still reads 25%. After one complete discharge-charge calibration cycle, the gauge tracks the actual voltage curve and the early shutdowns stop. If shutdowns continue past two full cycles, check that cell voltage at rest reads above 3.6V before charging.

Compatible Models

C5300 S3636 QT-52 M6464

Replaces Part Numbers

SIB-11 SIB-16

Technical Specifications

Voltage3.7V
Amp Hours1200mAh
Capacity1200mAh
Rate4.44Wh
Net Weight31g /1.09 oz
Gross Weight56g /1.98 oz
Approximate Weight56g /1.98 oz
Dimension 53.00 x 33.90 x 5.70mm

Product Highlights

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

Frequently Asked Questions

The phone won't turn on at all after the replacement battery sat in a drawer for a few months — is the cell dead?

It's likely a BMS lockout. When a Li-ion cell drops below roughly 2.5V from extended storage, the protection circuit opens and refuses to pass current until it sees a trickle charge stimulus. Connect the phone to a wall charger — not a PC USB port — and leave it for 20 to 30 minutes without pressing the power button. The charger's higher output voltage is usually enough to nudge the BMS back into normal charge mode. If the battery icon appears after that window, the cell is recovering; charge fully before first boot.

Fast charging stopped working after I fitted the replacement — the phone charges slowly on the same charger that worked fine before.

On the first cycle after a cell swap, the charge IC sometimes defaults to a lower constant-current profile because the BMS on the new cell hasn't yet completed a USB handshake with the device's charge controller. This is normal behaviour on the first cycle. Run one full slow charge to 100%, then disconnect and power the phone on. On the next charge cycle, fast charge should re-negotiate correctly. If it doesn't, try a different USB cable — high-impedance cables prevent the protocol handshake from completing.

Battery percentage is jumping around erratically — goes from 60% to 45% in minutes, then jumps back up.

The coulomb counter inside the phone is still referencing the old cell's discharge curve and losing track of actual state-of-charge under variable loads. Screen-on, GPS, or mobile data bursts cause current spikes that push the uncalibrated gauge past the edges of its stored curve, producing the erratic jumps. The fix is one full uninterrupted discharge to auto-shutoff followed by a continuous charge to 100% with the screen off. After that cycle the gauge recalibrates against the new cell and percentage readings stabilise.

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