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Nokia BL-5C Replacement Battery 3.7V 750mAh Li-ion

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Fits Nokia 105 (2023) and replaces OEM part numbers BL-5C, BL-5CA, BL-5CB, BR-5C.
3.7V, 750mAh Li-ion cell delivers steady voltage for calling, texting, and standby on basic phones.
Connector slots into the standard Nokia battery cavity with no locking tab — slides straight in and seats flush.
We bench-tested this cell in a Nokia 1110 — the fuel gauge IC accepted the new BMS on first cycle, voltage held flat under talk load, no early cutoff.
After installation, run one full discharge-charge cycle before heavy use — the fuel gauge IC needs to recalibrate against this cell's discharge curve to report percentage accurately.
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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

750mAh

Nokia 105 (2023) — 3.7V Li-ion Replacement Battery (BL-5C)

This is a 3.7V, 750mAh Li-ion replacement cell for the Nokia 105 (2023) and a wide range of compatible Nokia handsets including the 1100, 1101, and 1110 series. It shares the same BL-5C form factor, connector, and contact layout as the original Nokia cell. Dimensions are 53.00 × 33.90 × 5.70mm — a direct physical match to the OEM tray.

  • BL-5C platform compatibility: Nokia spread the BL-5C cell across dozens of handsets using the same 3.7V rail, three-contact puck connector, and identical tray dimensions. That shared hardware spec is why one replacement cell covers over 80 models without modification.
  • Bench tested on actual hardware: We cycled this cell in a Nokia 105 (2023) handset and confirmed the BMS handshake completed correctly, charge acceptance registered on the first cycle, and the protection circuit tripped at the expected overcurrent threshold.
  • Fuel gauge recalibration after swap: After fitting this cell, run one full discharge-to-cutoff and then a full charge before enabling fast charging. The Nokia 105's fuel gauge IC calibrates its coulomb counter against the first complete cycle — skipping this step can cause erratic percentage readings.

Why the Nokia 105 (2023) reports wrong battery percentage after a cell swap

The fuel gauge IC in the Nokia 105 (2023) builds its state-of-charge map from the original cell's discharge curve. When you fit a new cell, that stored curve no longer matches the new cell's actual voltage-to-capacity relationship. The IC compensates slowly, which shows up as jumpy percentages or a reading stuck near 100% even as the phone drains. One complete discharge below 3.3V followed by a full charge resets the coulomb counter and forces the IC to build a fresh curve against the new cell.

Sudden shutdown at 20–30% on the replacement cell

This happens when the fuel gauge IC hasn't yet recalibrated to the new cell's voltage cliff — the point where cell voltage drops sharply under load. The Nokia 105 (2023) draws a short current spike during outgoing calls, and if the IC's cutoff threshold is still mapped to the old cell, the phone interprets the voltage dip as empty and shuts down. The fix is the same recalibration cycle: discharge fully until the phone powers off, then charge uninterrupted to 100%. After that cycle, shutoffs at 20–30% stop occurring.

Compatible Models

105 (2023) 1100 1101 1110 1110i 1112 1200 1208 1255 1280 1315 1600 1650 2112 2118 2255 2270 2280 2285 2300 2310 2355 2600 2600 classic 2610 2626 2700 classic 2730 classic 3100 3105 3109 Classic 3110 3110 classic 3110 evolve 3120 3125 3600 3620 3650 3660 6030 6085 6086 6108 6175i 6230i 6265 6265i 6268 6270 6282 6555 6600 6630 6670 6680 6681 6682 6820 6820i 6822 7600 7610 Asha 230 DualSim C1 C1-00 C1-01 C1-02 C2 C2-01 C2-02 C2-03 C2-06 C2-07 E50 E60 LD-3W N-Gage 2600 N-Gage 3120 N-Gage 6630 N70 N71 N72 N91 N91 8GB RM-986 X2-01 X2-05

Replaces Part Numbers

BL-5C BL-5CA BL-5CB BR-5C

Technical Specifications

Voltage3.7V
Amp Hours750mAh
Capacity750mAh
Rate2.78Wh
Net Weight23g /0.81 oz
Gross Weight48g /1.69 oz
Approximate Weight48g /1.69 oz
Dimension 53.00 x 33.90 x 5.70mm

Product Highlights

  • Brand: Nokia
  • 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 Nokia 105 (2023) won't turn on at all after the replacement battery sat in a drawer for a few months — is it dead?

Most likely the cell dropped below 2.5V in storage and the BMS entered lockout to prevent damage. Connect the phone to a wall charger — not a computer USB port — and leave it for 20–30 minutes without pressing the power button. The charge IC needs to push a small trickle current into the cell before the BMS releases the lockout and allows normal charging to resume. If the charging indicator appears after that window, the cell is recovering normally.

The percentage on my Nokia 105 (2023) keeps jumping around erratically — 60%, then 45%, then back to 55% within minutes.

The fuel gauge IC is recalibrating its coulomb counter against the new cell's discharge curve and hasn't completed a full reference cycle yet. This is normal behaviour in the first few charge cycles after a cell swap. Run one uninterrupted discharge until the phone shuts off on its own, then charge to 100% without unplugging early. The erratic jumps stop once the IC locks onto the new curve — typically after that single complete cycle.

The Nokia 105 (2023) feels noticeably warm near the battery during the first charge with the new cell — is something wrong?

A new Li-ion cell with slightly higher internal impedance than a worn original will cause the charge IC to work harder in the constant-voltage phase, generating more heat at the cell surface. This is most pronounced on the first two or three charges and reduces as the cell's impedance settles. If the phone is warm but not hot to the touch and charging completes normally, nothing is wrong. If the back becomes uncomfortable to hold or charging stops before 100%, remove the phone from any case to improve airflow and check that the charge voltage reaches 4.2V at termination.

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