Views: 0 Author: Site Editor Publish Time: 2026-06-15 Origin: Site
You can often see battery model sizes like 1254, 1054, 1654, 401012, 381323, and 400909 in true wireless bluetooth earbuds. These numbers tell you the diameter and thickness in millimeters. For example, the 1254 battery has a 12 mm diameter and a 5.4 mm thickness. The 1054 battery is 10 mm wide and 5.4 mm thick.
Model | Diameter (mm) | Thickness (mm) | Voltage (V) | Capacity (mAh) |
|---|---|---|---|---|
1254 | 12 | 5.4 | 3.7, 3.8, 3.85 | 70 to 75 |
1054 | 10 | 5.4 | 3.7, 3.8, 3.85 | 46 to 52 |
You need the right tws earphone battery to keep your rechargeable earbud battery working well. The correct battery model sizes help your tws earbuds feel comfortable and last longer between charges. Choosing the right wireless earphone batteries also helps with active noise cancellation and sound quality. Always match your bluetooth headset battery to your earphones for the best battery life and performance. This is important for tws, true wireless stereo, and all bluetooth earphones. The right battery keeps your charging case ready and your earphone safe.
Battery model numbers tell you the size. The first numbers show how wide the battery is. The last numbers show how thick it is in millimeters.
Picking the right battery model helps earphones work better. It changes how comfortable they feel. It also changes battery life and sound quality.
Bigger batteries let you use earphones longer. You can listen or talk more before charging them again.
LiPo batteries are safer for TWS earphones. They are also more flexible than Li-Ion batteries. LiPo batteries lower the chance of leaks and fires.
Always check if the battery fits before replacing it. Make sure the model numbers and details match. This stops charging problems and damage.
When you look at a tws earphone battery, you will see a model number like 1254, 1054, or 401012. These numbers tell you the size of the battery. The first two digits show the diameter or width in millimeters. The last two or four digits show the thickness or length. For example, a 1254 battery has a diameter of 12 mm and a thickness of 5.4 mm. Some batteries use a six-digit code, such as 401012, which means the battery is 4 mm thick, 10 mm wide, and 12 mm long.
You should always check the model number before buying a replacement. If you choose the wrong size, the battery may not fit your earphone or may not work well. Try to match the original battery’s capacity within plus or minus 10 percent. This helps you avoid problems with battery life or performance.
Many tws earbuds use small, rechargeable batteries. These batteries usually have a capacity of less than 100mAh. The charging case often holds a bigger battery, from 200mAh up to 1000mAh. Here are some of the most common battery models you will find in bluetooth earphones:
Battery Model | Voltage (V) | Capacity (mAh) | Size (mm) | Internal Resistance (mΩ) |
|---|---|---|---|---|
1254 | 3.7, 3.8, 3.85 | 70 to 75 | 12 (diameter) x 5.4 (height) | 180 |
1054 | 3.7, 3.8, 3.85 | 46 to 52 | 10 (diameter) x 5.4 (height) | 200 |
1654 | N/A | N/A | N/A | N/A |
401012 | 3.7 | 30 | 4 x 10 x 12 | N/A |
381323 | 3.7 | 40 | 3.8 x 13 x 23 | N/A |
400909 | 3.7 | 35 | 4 x 9 x 9 | N/A |
You can see that each battery has a different size and capacity. The right battery helps your earphone last longer and keeps your earbuds safe. Always check the specs before you buy a new battery for your tws.
When you pick a tws earphone battery, you choose how long your earbuds last. The battery size changes how long you can use your earbuds. Bigger batteries let you listen or talk for more hours before charging. Smaller batteries lose power faster, so you need to charge more often.
Bigger batteries let you use your earbuds longer for music or calls.
Battery technology can limit how long your earbuds work, even if you want more time.
Some companies make earbuds look nice or feel light, but this can mean less battery life.
Some tws earbuds do not last as long as you hope, so you may need new ones sooner.
You should always look at the battery size and capacity before buying new earbuds. This helps you know how long they will last and keeps your bluetooth earphones working well.
The battery also changes how your earphones feel and fit in your ear. Designers must make sure the battery fits with comfort and style. If the battery is too big, the earbuds might feel heavy or hurt your ears. If the battery is too small, you might not get enough power for features like active noise cancellation or bluetooth.
You want earbuds that last long but also feel good in your ears.
Earphones come in many shapes and sizes, and the battery must fit inside without making them too big.
Many tws earbuds use different ear tip sizes and special shapes to help them feel better, even with a small battery.
You will see that tws earbuds are easy to carry and let you move freely. But small batteries mean you need the charging case to keep them powered. This design also means there are more parts, like two batteries and two microphones, which can wear out over time. Always think about how the battery changes comfort and performance when you pick new tws earbuds.
There are two main types of rechargeable batteries in TWS earphones. These are lithium-ion (Li-Ion) and lithium-polymer (LiPo). Both batteries give power to your earbuds. They help your earbuds last longer between charges. These batteries are small and charge quickly. That is why they are good for bluetooth devices like TWS earbuds.
You can look at the table below to compare LiPo and Li-Ion batteries:
Feature | Lithium Polymer (LiPo) | Lithium Ion (Li-Ion) |
|---|---|---|
Self-Discharge | Low | Higher |
Battery Capacity | 10-15% higher than steel shell batteries | Standard capacity |
Cycle Life | More than 500 cycles | Varies |
Customization | Highly customizable | Limited customization |
Safety | Less likely to explode, pouch-style design | More sensitive to heat and impact |
Memory Effect | No memory effect | Can have memory effect |
Packaging | Aluminum-plastic soft packaging | Metal shell |
LiPo batteries use a pouch-style design. This makes leaks, swelling, or fires less likely. Li-Ion batteries can get damaged by heat or being dropped. You need a good battery management system to keep them safe. LiPo batteries are usually safer and more flexible for your tws earphone battery.
Tip: If you want safer and more flexible earbuds, pick ones with LiPo batteries.
Both LiPo and Li-Ion batteries work well in thin devices. They store a lot of energy for their size. This means you can use your earphones longer. Their shapes can fit into the small space inside tws earbuds.
LiPo batteries can be made in many shapes and sizes. This gives more choices for earphone design and comfort.
Li-Ion batteries are mostly made in standard shapes. You may not see as many options in your earbuds.
Both battery types let companies make small tws earbuds with good battery life.
These rechargeable batteries keep your bluetooth earphones working. The right battery helps with charging, noise cancellation, and long use. You can listen to music and talk on calls without charging all the time.
The 1254 battery is used in many TWS earbuds. It gives a good mix of size and battery life. You can find it in mid-range and premium earphones. This battery fits most designs and supports active noise cancellation.
Specification | Value |
|---|---|
Voltage | 3.7V, 3.8V, 3.85V |
Capacity | 70mAh to 75mAh |
Size | 12mm (diameter) x 5.4mm (height) |
Internal Resistance (IR) | 180mΩ |
Max. Charging Current | 210~225mA |
Maximum Continuous Discharge Current | 140~150mA |
Operating Temperature (Charging) | 0℃~45℃ |
Operating Temperature (Discharging) | -20℃~60℃ |
Typical Use Cases:
Mid-range and premium TWS earbuds
Earphones with active noise cancellation
Bluetooth earbuds with long battery life
The 1254 tws earphone battery gives steady power and safe charging.
The 1054 battery is found in entry-level and mid-tier TWS earbuds. It works well in small and light earphones. This battery gives enough power for basic features and keeps earbuds light.
Feature | Description |
|---|---|
Voltage | 3.6V/3.7V |
Capacity | 45mAh |
Size | 10.0 × 5.4 mm |
Weight | 1.4 g |
Use Cases | Entry-tier and mid-tier TWS Bluetooth earbuds, white-label audio products, compact IoT sensors, electronic toys |
Typical Use Cases:
Entry-level TWS earbuds
Bluetooth earphones for daily use
Compact rechargeable devices
The 1054 battery is good for small earbuds that need to be light.
The 1654 battery is used in some bigger TWS earbuds. It has more capacity than the 1054 and 1254 batteries. This battery fits earphones that need extra power for special features.
Specifications:
Voltage: 3.7V
Capacity: 80mAh to 85mAh
Size: 16mm (diameter) x 5.4mm (height)
Use Cases: High-end TWS earbuds, earphones with long battery life, Bluetooth earbuds with extra features
Typical Use Cases:
Premium TWS earbuds with longer battery life
Earphones with better sound quality
The 1654 battery lets you listen longer on your TWS earbuds.
The 401012 battery is a lithium polymer type. You see it in slim and light TWS earbuds. This battery is thin and fits in small earphones.
Feature | Description |
|---|---|
Battery Type | Lithium Polymer |
Voltage | 3.7V |
Capacity | 30mAh, 35mAh, 40mAh |
Cycle Life | Over 500 cycles |
Application | Ideal for compact and lightweight TWS earphones |
Typical Use Cases:
Slim TWS earbuds
Lightweight rechargeable earphones
Bluetooth earbuds for travel
The 401012 battery is used in earbuds that need to be thin and light.
The 381323 battery is found in TWS earbuds that need a balance of size and power. It fits earphones with medium battery life and small designs.
Specifications:
Voltage: 3.7V
Capacity: 40mAh
Size: 3.8mm x 13mm x 23mm
Use Cases: Compact TWS earbuds, rechargeable earphones, Bluetooth earbuds with moderate battery life
Typical Use Cases:
Earphones with balanced battery life and comfort
TWS earbuds for daily use
The 381323 battery gives steady power in your earphones.
The 400909 battery is used in very small TWS earbuds. It fits earphones that need a tiny battery for a slim shape. This battery gives enough power for simple features.
Specifications:
Voltage: 3.7V
Capacity: 35mAh
Size: 4mm x 9mm x 9mm
Use Cases: Ultra-compact TWS earbuds, lightweight rechargeable earphones, Bluetooth earbuds for short use
Typical Use Cases:
Earphones with a slim and light design
TWS earbuds for quick listening sessions
The 400909 battery is used in earbuds that need to be small and light.
You should know your tws earphone battery model size. This helps keep your earbuds safe and working well. Always check the battery model, size, and capacity for your earphone. Find rechargeable batteries with good energy density and safe charging. Before you buy, use this checklist:
Make sure the battery model number and size match.
Check if it works with bluetooth and has a warranty.
Look for safety certifications and technical papers.
If you use the wrong battery, your earbuds may not charge right. It can cause damage or make features stop working. Always check every detail before you upgrade.
You see numbers like 1254 or 401012. The first digits show diameter or thickness in millimeters. The last digits show length or height. Always check these numbers before buying a replacement.
You can check your earbud’s manual or look at the old battery. Match the model number, size, and capacity. If you need help, ask the manufacturer.
You may upgrade if the new battery fits and matches voltage. Bigger batteries can give more hours, but they must fit inside your earbuds. Always check compatibility.
Using the wrong battery can cause charging problems or damage your earbuds. You may lose features like noise cancellation. Always use the correct size and model.
