Our goal is to be your true partner in 40 Series Battery field in China. We are a private enterprise specializing in the field of small polymer lithium-ion batteries, integrating research and development, production, and sales; Committed to providing customers with environmentally friendly, safe, and durable polymer lithium-ion battery products and solutions. The company focuses on the Bluetooth polymer industry, and its products are widely used in Bluetooth earphones, smart wearables, smart healthcare, smart furniture, smart jewelry, GPS and other fields.The price is competitive and the product is quality-assured, which is a good choice for your long-term cooperation.
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401015 Bluetooth Headphone Lithium Battery40mah Polymer Lithium Ion Batteryview more
Batteries: 3.7v 40mah lipo battery
Charge voltage: 4.2V
Nominal voltage: 3.7V
Nominal capacity: 40mAh 0.2C Discharge
Charge current: Standard Charging:0.5C Rapid... -
25mAh 3.7V Bluetooth Headphone Polymer Lithium Battery - ...25mah Polymer Lithium Ion Batteryview more
Batteries: 3.7v 25mah lipo battery
Charge voltage: 4.2V
Nominal voltage: 3.7V
Nominal capacity: 280mAh 0.2C Discharge
Charge current: Standard Charging:0.5C Rapid... -
602035-400mah Polymer Lithium Ion Battery400mah Polymer Lithium Ion Batteryview more
Batteries: 3.7v 400mah lipo battery
Charge voltage: 4.2V
Nominal voltage: 3.7V
Nominal capacity: 400mAh 0.2C Discharge
Charge current: Standard Charging:0.5C... -
400mah Polymer Lithium Ion Battery400mah Polymer Lithium Ion Batteryview more
Batteries: 3.7v 400mah lipo battery
Charge voltage: 4.2V
Nominal voltage: 3.7V
Nominal capacity: 400mAh 0.2C Discharge
Charge current: Standard Charging:0.5C Rapid... -
50mah Polymer Lithium Ion BatteryBatteries: 3.7v 50mah lipo batteryview more
Charge voltage: 4.2V
Nominal voltage: 3.7V
Nominal capacity: 280mAh 0.2C Discharge
Charge current: Standard Charging:0.5C Rapid charge: 1.0C
Standard Charging method:... -
Lithium Ion Polymer Battery 3.7 V 35mahBatteries: 3.7v 35mah lipo batteryview more
Charge voltage: 4.2V
Nominal voltage: 3.7V
Nominal capacity: 1000mAh 0.2C Discharge
Charge current: Standard Charging: 0.5C Rapid charge: 1.0C -
Rechargeable Lithium Ion Polymer Battery Pack 3.7 VBatteries: 3.7v 35mah lipo batteryview more
Charge voltage: 4.2V
Nominal voltage: 3.7V
Nominal capacity: 1000mAh 0.2C Discharge
Charge current: Standard Charging: 0.5C Rapid charge: 1.0C -
Lithium Ion Polymer Battery 3.7 V 250mahBatteries: 3.7v 250mAh lipo batteryview more
Charge voltage: 4.2V
Nominal voltage: 3.7V
Nominal capacity: 250mAh 0.2C Discharge
Charge current: Standard Charging: 0.5C Rapid charge: 1.0C -
Lithium Ion Polymer Battery 3.7 V 120mahBatteries: 3.7v 120mah lipo batteryview more
Charge voltage: 4.2V
Nominal voltage: 3.7V
Nominal capacity: 300mAh 0.2C Discharge
Charge current: Standard Charging: 0.5C Rapid charge: 1.0C -
Lithium Ion Polymer Battery 3.7 V 200mahBatteries: 3.7v 200mAh lipo batteryview more
Charge voltage: 4.2V
Nominal voltage: 3.7V
Nominal capacity: 250mAh 0.2C Discharge
Charge current: Standard Charging: 0.5C Rapid charge: 1.0C -
Lithium Ion Battery 65mahBatteries: 3.7v 65mah lipo batteryview more
Charge voltage: 4.2V
Nominal voltage: 3.7V
Nominal capacity: 1000mAh 0.2C Discharge
Charge current: Standard Charging: 0.5C Rapid charge: 1.0C -
3.7v 280mah Polymer Lithium Ion BatteryBatteries: 3.7v 280mah lipo batteryview more
Charge voltage: 4.2V
Nominal voltage: 3.7V
Nominal capacity: 1000mAh 0.2C Discharge
Charge current: Standard Charging: 0.5C Rapid charge: 1.0C
Why Choose Us
Product Application
The company focuses on the bluetooth consumer industry, and its products are widely evaluated in the fields of bluetooth headsets, smart wearables, smart medical care, smart furniture, smart jewelry, gps, etc.
Our Products
Polymer lithium battery, tws, 30 series, 40 series, 50 series, 60 series, 70 series, 80 series, 90 series, 10 series, 11 series, fast charging, 1-3c series, customized models.
Our Certificates
Ccc certification, 9001 quality system certification, kc certification, ul certification, rohs standard, two invention patents, utility patents.
Production Equipment
Including hundreds of equipment such as winders, mixers, automatic slitting machines, automatic film making machines, winders, vacuum ovens, etc...
Advantages of Battery
Power On The Go
Batteries make portable devices like phones, laptops, and power tools possible, allowing users to access power anywhere.
01
Versatile Applications
They power a wide range of devices, from small electronics to electric vehicles and backup power systems.
02
Storing Surplus Energy
Batteries can store electricity generated from renewable sources (like solar and wind) or conventional sources, ensuring energy is used efficiently and not wasted.
03
Backup Power
During power outages, batteries can provide a reliable backup power source, keeping essential appliances and devices running.
04
Reduced Reliance On The Grid
By storing and using their own energy, homes and businesses can reduce their dependence on the electricity grid, potentially saving money and improving energy security.
05
Applications of Battery




Portable Electronics
Lithium-ion batteries have become the lifeblood of portable electronics, powering our smartphones, laptops, tablets, and wearable devices. Their compact size, high energy density, and long-lasting performance have made them the preferred choice for these devices. With their ability to provide sustained power and quick recharge times, lithium-ion batteries have transformed the way we communicate, work, and entertain ourselves on the go.
Electric Vehicles
The automotive industry has embraced the potential of lithium-ion batteries, enabling the widespread adoption of electric vehicles (evs). These batteries offer the necessary power and range for evs, thereby reducing dependence on fossil fuels and mitigating environmental impact. With continuous advancements in battery technology, the ev market is experiencing exponential growth, paving the way for a greener and sustainable transportation future.
Renewable Energy Storage
Lithium-ion batteries play a vital role in the storage of energy generated by renewable sources such as solar and wind. They provide a means to capture and store excess energy during peak production periods and release it during times of high demand or low generation. This helps stabilize the power grid and promotes the integration of renewable energy sources into the existing infrastructure, fostering a cleaner and more resilient energy system.
Medical Devices
In the realm of healthcare, lithium-ion batteries have proven indispensable in various medical devices. From pacemakers to insulin pumps and portable medical equipment, these batteries ensure reliable and uninterrupted power supply, enhancing patient care and quality of life. Their small form factor and high energy density make them ideal for implantable and wearable medical devices, where long battery life and safety are paramount.
Aerospace And Defense
Lithium-ion batteries have found their way into the aerospace and defense sectors, powering satellites, drones, and military equipment. Their lightweight design and high energy density make them invaluable for applications where weight reduction and long-duration power are critical. From deep space exploration to tactical missions, these batteries offer the necessary power storage capabilities for advancing technological frontiers.
Battery Power Density Comparision Table
|
Battery Type |
Energy Density (Wh/kg) |
Life Cycle |
Toxicity |
|
Li-Ion |
126-190 |
500-1,000 |
Low |
|
Ni-Cd |
45-80 |
1000 |
High |
|
Ni-MH |
100 |
300-500 |
Low |
|
Li-ion polymer |
185 |
300 – 500 |
Low |
|
Lead Acid |
30-50 |
200-300 |
High |
|
Lithium–Sulfur |
55 |
50-100 |
Non- Toxic |
Product Description
|
Items |
Specifications |
|
Batteries |
3.7v 50mah lipo battery |
|
Charge voltage |
4.2V |
|
Nominal voltage |
3.7V |
|
Nominal capacity |
280mAh 0.2C Discharge |
|
Charge current |
Standard Charging:0.5C Rapid charge: 1.0C |
|
Standard Charging method |
0.5C CC(constant current)charge to 4.2V, then CV(constant voltage 4.2V)charge till charge current decline to ≤0.05C |
|
Charging time |
Standard Charging:2.75hours(Ref.) Rapid charge: 2hours(Ref.) |
|
Max.charge current |
1.0C |
|
Max.discharge current |
1.0C |
|
Discharge cut-off voltage |
2.75V(0.2C) |
|
Perating temperature |
ChCharging: 0 °C ~45 °C Discharging:0 °C ~45 °Carging: 0 °C ~45 °C |
|
Discharging:Storage temperature0 °C ~45 °C |
-10°C~ +45 °C |
|
Dimension |
Length: 50±2mm (not including tabs) Width: 20±0.5mm Thickness:10±0.2mm |
|
Drop Test |
The cell is to be dropped from a height of meter twice onto concrete ground. No fire, no leakage |
|
Cycle time |
≥300times |
Delivery
|
Selling Units |
Single item |
|
Single package size |
1X1X1 cm |
|
Single gross weight |
1.000 kg |
Lead Time
|
Quantity (pieces) |
1 - 3000 |
> 3000 |
|
Lead time (days) |
35 |
To be negotiated |
Packaging & Shipping

FAQ
We're professional battery manufacturers and suppliers in China, specialized in providing high quality custom service. We warmly welcome you to wholesale cheap battery from our factory. For price consultation, contact us.
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