Low Self Discharge LiPo Battery 282028 / 3.7V 140mAh Lithium Polymer Battery for Wearable Devices
| Battery Type: | LiPo Battery | Nominal Voltage: | 3.7V |
| Nominal Capacity: | 140mAh | Energy: | 0.518Wh |
| Charge Voltage: | 4.2V | Max Charge and Discharge Current: | 1.0C/140mA |
| Battery Cell Dimensions: | Max 2.8*20.0*28.0mm | Battery Pack Dimensions: | Max 3.5*20.0*30.0mm |
| Cycle Life: | ≥500 Times | Warranty: | 1 Year |
| High Light: | wearable rechargeable battery,wearable device battery |
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Low Self Discharge LiPo Battery 282028 / 3.7V 140mAh Lithium Polymer Battery for Wearable Devices
LiPo Battery 282028 Overview
The 282028 low self-discharge LiPo Battery operates at 3.7V with a capacity of 140mAh, making it an excellent choice for wearable devices. This lithium polymer battery is designed to maintain its charge over extended periods, ensuring reliable performance for applications like fitness trackers, smartwatches, and health monitors. Its compact size allows for easy integration into sleek and lightweight designs, enhancing user comfort. The low self-discharge feature means less frequent charging is required, which is ideal for wearables that need to operate consistently. Overall, the 282028 LiPo battery offers a dependable energy solution for modern wearable technology.
LiPo Battery 282028 Technical Parameters
Basic Parameters
| Battery Type | LiPo Battery |
| Model Number | UNM 282028 |
| Nominal Voltage | 3.7V |
| Nominal Capacity | 150mAh |
| Cell Energy | 0.518Wh |
| Cell Chemistry | LiCoO₂ / NCM (Customizable) |
| Cell Dimensions (Max) | 2.8 × 20.0 × 28.0 mm |
| Pack Dimensions (Max) | 3.5 × 20.0 × 30.0 mm |
| Weight | Approx. 4.0g |
| Battery Pack Internal Impedance | ≤ 480 mΩ |
| Shipment Voltage | 3.85–4.0V (Adjustable upon request) |
Charge & Discharge Parameters
| Max Charge Voltage | 4.2V |
| Standard Charge Current | 0.2C (28mA) to 4.2V, CCCV Mode |
| Max Charge Current | 1.0C (140mA) | Customizable |
| Discharge Cut-off Voltage | 3.0V |
| Standard Discharge Current | 0.2C (28mA) |
| Max Continuous Discharge Current | 1.0C (140mA) | Customizable |
| Operating Temperature | Charge: 0–45 °C | Discharge: -20–60 °C |
LiPo Battery 282028 Dimension Figure
| T: 2.8mm Max( without 3M adhesive thickness ) | W: 20.0mm Max |
| T1: 3.5mm Max | H: 30.0mm Max |
LiPo Battery 282028 Applications
The 282028 140mAh 3.7V Lithium Polymer Battery is designed for compact electronic devices that require reliable power, lightweight construction, and extended standby performance. Its low self-discharge characteristics help maintain battery capacity during storage and infrequent use, making it ideal for portable and wearable applications.
Typical uses include: Smart watches and wearable devices, Fitness trackers and health monitoring equipment, Bluetooth headsets and wireless audio products, Smart rings and compact IoT devices, GPS tracking devices, Medical monitoring instruments, Electronic badges and ID devices, Portable sensors and data loggers, Smart glasses and AR wearable products, Miniature consumer electronics and custom electronic projects..
Custom configurations, including PCM/BMS protection circuits, connectors, and cable options, are available to ensure safe integration into your specific product requirements.
Quality & Safety Certifications
All UNEMETECH lithium polymer batteries undergo strict quality control and comply with international safety & transportation standards, ensuring safe and reliable performance worldwide.
Depending on project requirements and target market regulations, we can provide certification documents such as CB, IEC 62133, UN38.3, MSDS, KC, PSE, BSMI, UL, RCM, CE, REACH, and RoHs 2.0 test reports, and other compliance documentation as required.
Typical Customer Feedback
“The 282028 3.7V 140mAh LiPo battery has been an excellent choice for our wearable device. Its compact size, low self-discharge rate, and stable performance help extend standby time while ensuring reliable operation. The battery quality and consistency have exceeded our expectations.”
— Project Manager, GPS Tracker Device Manufacturer
Custom LiPo Battery Solutions
UNEMETECH provides customized LiPo Battery solutions for wearable devices, Bluetooth products, portable electronics, IoT equipment, and other battery-powered applications. Optional PCM/BMS protection circuits, connectors, wire lengths, labels, and battery pack assemblies can be configured according to your project requirements.
Whether you require prototype samples or volume production, our engineering team can support your battery customization needs with reliable manufacturing and technical assistance.
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