50mAh ~ 500mAh Polymer Battery
Polymer batteries, due to their high energy density and aluminum-plastic film casing, can be produced in various capacities and sizes. This makes them ideal for ultra-thin designs and long-lasting smart products.
Batteries ranging from 50mAh to 500mAh may include up to 100 different polymer battery models. They support different discharge rates, such as 3.0C, 5.0C, and 10.0C.
On the right are products that use polymer batteries, such as children’s toys. Feel free to inquire about your specific battery needs.
High Energy Density
Mass energy density: 100-265 Wh/kg Volume energy density: 250-730 Wh/L
Small Size
The size can be made as small as a button cell battery.
Lightweight
40% lighter than steel shell lithium batteries of the same capacity, and 20% lighter than cylindrical aluminum shell lithium batteries.
Flexible in size
We can design the battery's size and capacity based on its charge & discharge rate to fit specific device spaces.
Lithium Polymer Battery Model
Below are some of the 3.7V lithium batteries we produce in the capacity range of 50mAh to 500mAh. Each battery comes with a protection board and electronic wires, and has overcharge, over-discharge, and short circuit protection features.
Polymer battery molds are very cheap, and we can help customers develop specific battery models freely.
551430 3.7V 180mAh Battery
Nominal voltage: 3.7V
Nominal capacity: 180mAh
Rated energy: 0.666Wh
Thickness: ≤5.5mm
Widness: ≤14.0mm
Length: ≤30.0mm
Internal resistance: ≤150mΩ
502025 3.7V 200mAh Battery
Nominal voltage: 3.7V
Nominal capacity: 200mAh
Rated energy: 0.74Wh
Thickness: ≤5.0mm
Widness: ≤20.0mm
Length: ≤25.0mm
Internal resistance: ≤120mΩ
602035 3.7V 400mAh Battery
Nominal voltage: 3.7V
Nominal capacity: 400mAh
Rated energy: 1.48Wh
Thickness: ≤6.0mm
Widness: ≤20.0mm
Length: ≤35.0mm
Internal resistance: ≤100mΩ
602025 3.7V 250mAh Battery
Nominal voltage: 3.7V
Nominal capacity: 250mAh
Rated energy: 0.925Wh
Thickness: ≤6.0mm
Widness: ≤20.0mm
Length: ≤25.0mm
Internal resistance: ≤120mΩ
Lithium Polymer Battery Application
Consumer Electronics:
- Wireless Earphones: Provide lasting power for Bluetooth earphones and true wireless earphones, allowing for an unrestrained listening experience.
- Wearable Devices: Supply power for smartwatches, fitness trackers, and other wearables, supporting health monitoring and data tracking.
- Smart Glasses: Provide stable and reliable power for smart glasses, supporting augmented reality (AR) and other functions.
- Others: Devices like e-readers, gaming consoles, and remote controls also commonly use 50-500mAh polymer lithium batteries.
Other Potential Application Areas:
- Medical Devices: Provide power for medical devices like glucose meters and blood pressure monitors, supporting health monitoring.
- Sensors: Provide energy for wireless sensors and IoT devices, realizing the interconnection of everything.
How we produce lithium polymer battery packs
Below is our factory lithium polymer battery manufacturing 4 main processes. It includes from raw materials to final battery product.
Electrode Preparation:
- Mixing: Combine the electrode active material with solvents, conductive agents, binders, and other components to create a slurry.
- Coating: Evenly coat the electrode slurry onto the current collector.
- Rolling and Cutting: Roll and cut the material into electrode sheets.
Cell Assembly:
- Winding: Wind the positive and negative electrode sheets with the separator in a specific order to form the cell.
- Baking: Vacuum bake the wound cells to remove moisture.
- Electrolyte Injection: Inject the predetermined electrolyte into the cells.
- Packaging: Place the cells into aluminum-plastic film packaging and vacuum seal them.
Battery Formation:
- Formation: Perform the initial charge and discharge of the battery to form the SEI film and activate the battery.
- Capacity Grading: Screen and classify the batteries based on their capacity.
Cell Tab Welding and Wiring:
- Add PCM: Based on the charge and discharge requirements, the pre-designed protection board and electronic wires (terminal wires) are spot welded to the cell.
- Test: The battery is then tested using a comprehensive battery tester to check voltage, internal resistance, and protection board performance parameters. Finally, it undergoes aging.
3.7V lithium polymer battery Model
Hongyitai is a lithium battery manufacturer in China, and it starts from 50mAh to 500mAh capacity models. You can review many lipo battery models from below listing.
Model | Voltage (V) | Capacity (mAh) | Dimension (Thick*Width*Length) (mm) | Lifespan (25℃,0.5C,80%DOD) | Weight (Kg) | Protection Function | Know More |
|---|---|---|---|---|---|---|---|
HYT551430 | 3.7 | 180 | 5.5*14*30 | >500 | 4 | Yes | |
HYT502025 | 3.7 | 200 | 5*20*25 | >500 | 4 | Yes | |
HYT602035 | 3.7 | 400 | 6*20*35 | >500 | 8 | Yes | |
HYT652025 | 3.7 | 250 | 6.5*20*25 | >500 | 5 | Yes | |
HYT303450 | 3.7 | 500 | 3*34*50 | >500 | 10 | Yes | |
HYT452530 | 3.7 | 300 | 4.5*25*30 | >500 | 6 | Yes | |
HYT371168 | 3.7 | 220 | 3.7*11*68 | >500 | 4 | Yes | |
HYT551035 | 3.7 | 150 | 5.5*10*35 | >500 | 3 | Yes | |
HYT453535 | 3.7 | 500 | 4.5*35*35 | >500 | 10 | Yes | |
HYT501030 | 3.7 | 100 | 5*10*30 | >500 | 2.5 | Yes | |
HYT452535 | 3.7 | 350 | 4.5*25*35 | >500 | 7 | Yes |
Lithium Battery Factory-direct Pricing
- Minimum Order Quantity: 1,000 pieces per model.
- All orders come with the necessary certificates.
- Any model can be customized in terms of voltage, capacity, size, and charge/discharge rate.
Features of Polymer Lithium Battery Chargers
- Charging Characteristics:
Need to match the charging characteristics of polymer lithium batteries, capable of completing the three stages of pre-charge, constant current charging, and constant voltage charging. - Charging Voltage:
Generally between 4.15V and 4.28V. The charging current is set according to the battery capacity, with common specifications being 0.5A, 1A, and 2A. There are also specifications for US, EU, and Japan standards. - Safety Protections:
Include multiple safety protection functions such as overcharge protection, short circuit protection, and temperature protection. - User-Friendly Designs:
Some chargers integrate features like power indicators and mainstream interfaces like Type-C.
According to the charging current size and charging method, they can be divided into:
- 50mAh~500mAh Low Current USB Chargers: Current is generally around 0.5A or even smaller, making them convenient to carry.
Polymer Lithium Battery Charging Precautions
- Choosing the Right Charger: Select a charger with the appropriate specifications to match the battery’s voltage and capacity parameters.
- First-Time Use: The battery needs to be activated during the first use. It is recommended to fully charge with a low current and then discharge, repeating the cycle 1-2 times.
- Temperature Conditions: Pay attention to the temperature conditions during charging, generally suitable between 0-40°C.
- Avoid Overcharging and Overdischarging: To prevent damage to the battery, do not overcharge or overdischarge.
Why select us as lithium polymer battery supplier
Hongyitai has been producing polymer batteries for over 10 years, with hundreds of battery models and various material systems. We have a comprehensive set of production facilities, including a testing center, R&D center, certification center, sample center, and inspections at all stages of production. After shipment, we provide an inspection report for the batch of goods. The data and images you see will be exactly the same as the batteries you receive.
- 10 Years Experience: Over 10 years working experience in polymer battery field.
- Free Samples: Provide 7 days free samples freely.
- Certified: Provide UL1642, IEC62133, UN38.3, MSDS, CE certificates as it is ready.
- Full Models Available: Produce no matter which li-polymer battery you want.
- Tech Support: Before production, our engineer team will guide and evaluate your battery requiments.
The following is a simplified description of our lithium polymer battery manufacturing process:
1. Mixing
Make a slurry of cathode (positive side) and anode (negative side) electrodes according to the scheme and recipe of the polymer battery model.
2. Coating
Paste is applied to a metal foil (aluminum for cathode, copper for anode). This creates the desired positive and negative plates
3. Cutting
Cut the dried electrode plates to the exact length and width required for the battery cell.
4. Winding
The cathode, anode and diaphragm are wound together. Forms the internal structure of the cell.
5. Injection of electrolyte
Inject electrolyte into the encapsulated cell to allow lithium ions to travel between the positive and negative plates.
6. Sealing & Formation
Encapsulate the cell with an aluminum-plastic film casing to prevent the electrolyte from being exposed. Activate the internal chemical material by charging and discharging.
7. Aging and Testing
Final test of capacity, voltage and overall performance through high and normal temperature aging tests.
Our li-polymer battery production process
FAQs for lithium-polymer batteries
We can provide samples within 1 week.
It will take 20~25 days for bulk battery order.
We can provide you UL1642, IEC62133, CB, UN38.3 and MSDS as what we have.
