I. Identifying the Pain Points: Are You Facing These Issues?

Did your Nokia 105 (2023) used to last days on a single charge, but now requires charging once or even twice a day?

Does the phone suddenly shut down during a call, even when the screen shows two or three bars of battery life?

Does it indicate it is charging when plugged in, yet the battery level fails to rise after hours of charging?

Is the back cover slightly bulging, causing the phone to wobble or spin when placed on a flat surface?

Have you missed alarms or calls at critical moments, leading to missed appointments or important issues?

If you are experiencing these problems, it indicates that your Nokia 105 (2023) battery has significantly aged. It is no longer the "charge-once-a-week" reliable backup phone it used to be; it is time for a battery replacement.

II. Why Replace the Battery? — The Science and Necessity

The Nokia 105 (2023) uses a removable lithium-ion battery. Lithium batteries operate by moving lithium ions back and forth between the positive and negative electrodes. Over time and with repeated charge-discharge cycles, the chemical activity inside the battery declines, internal resistance increases, and the actual usable capacity gradually diminishes.

Generally, after 300 to 500 complete charge-discharge cycles, a lithium battery's capacity drops significantly—often falling below 80% of its original capacity. Additionally, habits such as leaving the phone plugged in for extended periods, exposing it to high heat or direct sunlight, allowing it to fully drain (deep discharge), or using low-quality chargers can accelerate battery aging.

When capacity drops and internal resistance rises, the voltage can plummet instantly during high-current activities—such as making calls, searching for a network, or ringing—causing the phone to shut down automatically. If the battery is bulging, it indicates gas buildup and structural instability, posing a safety risk; it must be replaced immediately.

III. Key Benefits of Replacing the Battery

Restoring Long Battery Life

The Nokia 105 (2023) has very low power consumption. Installing a new battery restores its daily standby time to several days—or even over a week—making it a worry-free backup phone once again. Stable calls, fewer missed connections

A new battery provides stable voltage, preventing sudden shutdowns or restarts during calls and reducing the likelihood of missing important conversations.

Protects phone hardware

Aging batteries often have high internal resistance and generate excessive heat; prolonged use can damage the motherboard and charging circuitry. Swollen batteries can also put pressure on the screen and back cover. Timely replacement extends the device's overall lifespan.

Eliminates safety hazards

Replacing batteries that are swollen, leaking, or overheating effectively prevents damage to the device body caused by expansion and averts more serious safety issues.

Low cost, better value

Batteries for the Nokia 105 2023 are generally inexpensive; spending a small amount to revitalize the phone is far more economical than buying a brand-new device.

IV. Signs that the battery needs replacing

If you notice the following issues with your Nokia 105 2023, the battery likely needs replacement:

Significantly reduced battery life: Lasts less than two days of normal use after a full charge; standby time is noticeably shorter.

Abnormal battery level display: Battery level jumps (e.g., from 50% to 10%) or shows a full charge but shuts down quickly.

Abnormal charging time: Charging takes significantly longer, or the phone runs out of power quickly even after a full charge.

Automatic shutdown/restart: Shuts down automatically, especially during calls, when the alarm rings, or in cold temperatures.

Battery swelling: The back cover is pushed outward, making the phone sit unevenly on a flat surface.

Severe overheating: The battery area becomes excessively hot during charging or use.

Abnormal appearance: Oxidized battery contacts, a damaged casing, or signs of leakage.

V. Replacement process

Replacing the Nokia 105 2023 battery is simple; just follow these steps:

Prepare tools and a new battery

Purchase a genuine or reputable third-party battery compatible with the Nokia 105 2023. It typically uses the BL-5C series; please check the label on the existing battery for the exact model. Have a dry, soft cloth or a plastic pry tool ready.

Power off

Turn off the phone first to avoid working on a live device.

Remove the back cover

Gently pry open the back cover using the notch at the bottom or side of the device. Avoid using hard metal objects to prevent scratching the casing. Remove the old battery

Gently lift the battery from one corner to remove it. Check the battery for signs of swelling or leakage.

Clean the battery compartment

Use a dry cotton swab or soft cloth to clean the metal contacts inside the battery compartment to ensure a good connection.

Install the new battery

Insert the new battery according to the positive (+) and negative (-) polarity markings inside the compartment, and press it gently into place.

Reattach the back cover

Align the tabs and press evenly around the edges of the back cover to ensure a secure fit.

Power on and test

Press and hold the power button to turn on the device, then check the battery level display and charging function. It is recommended to use the new battery until the charge is low before fully charging it for the first time; this helps the system display the battery level more accurately. Lithium batteries do not require a "12-hour activation" period; you can charge and use them as needed.

VI. Success Stories and User Testimonials

User A: Backup phone back to weekly charging

"I use my Nokia 105 (2023) as a backup phone. It used to last a week on a single charge, but recently I’ve had to charge it daily. After replacing the battery, the standby time is back to around 5 days—I don't need to carry a charger for a week-long business trip."

User B: Phone for the elderly stops shutting down unexpectedly

"My elderly family member uses a Nokia 105 (2023), and they kept complaining that the phone would shut down on its own. After replacing the battery, calls are much more stable, and they haven't missed a single call since."

User C: Swollen battery replaced just in time

"I noticed the back cover was slightly bulging—the phone would spin if placed on a table. When I replaced the battery, I found the old one was indeed swollen. Now the back cover sits flat, and the phone doesn't get hot while charging; I feel much more at ease."

Note: The above is a summary of typical user feedback; actual battery life may vary depending on network conditions and usage habits.

VII. Call to Action

If your Nokia 105 (2023) is showing any of the signs mentioned above, don't put up with it. Replacing it with a genuine or high-quality compatible battery can breathe new life into this durable device.

Check your phone now: Is the back cover flat? How many days does a full charge last? Does it shut down unexpectedly? If the battery life is no longer adequate, we recommend replacing it with an original or high-quality compatible battery as soon as possible. If you aren't comfortable performing the replacement yourself, you can visit an authorized Nokia service center or a professional mobile phone repair shop. Don't let an aging battery compromise your calls, standby time, or safety. Replace it with a new battery so your Nokia 105 (2023) continues to serve you reliably.

Nokia 3.7V 1000mAh/3.7WH BL-L5J Replacement Battery For Nokia 105 2023