Introduction

3.7v 280mah Polymer Lithium Ion Battery integrates low-impedance cells and premium PCM to prevent swelling and over-discharge, ensuring long-term shelf life and reliable power for micro-devices.

Specification

Items	Specifications
Batteries	3.7v 280mah 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)
Operating temperature	Charging: 0 °C ~45 °C Discharging: 0 °C ~45 °
Storage temperature	-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 1 meter twice onto concrete ground. No fire, no leakage.
Cycle Life	≥300 times

Key Features

True Capacity Grading
Each cell is capacity tested and graded to ensure stable 280mAh output under standard conditions, reducing batch variation risk.

Structural Stability
Aluminum laminated pouch structure helps control swelling and supports tight-fit applications such as wearables and medical devices.

Low Self Discharge Design
PCM with low quiescent current reduces energy loss during storage, maintaining usable voltage over extended warehouse periods.

Solder Ready Tabs
Nickel tabs with stable surface treatment support consistent soldering performance in both manual and automated assembly processes.

Customization Services

Custom Lead Wires: Specific lengths and gauges (e.g., UL1571 28/30 AWG).

Connectors: Pre-installed JST-PH/ZHR, Molex 51021, or Hirose terminals.

Integrated PCM: Specialized protection boards for over-charge, over-discharge, and short-circuit prevention.

NTC Inclusion: Optional thermistors (10K/100K) for thermal safety during fast charging.

Application

Smart Wearables: Fitness trackers, smart rings, and premium Bluetooth headsets.

Medical Tech: Portable insulin pumps, heart rate monitors, and smart patches.

Iot & Connectivity: Asset trackers, wireless sensors, and covert security tags.

Beauty & Personal Care: Micro-current eye massagers and electronic toothbrushes.

Logistics & Quality Assurance

Global Certifications: Fully compliant with UN38.3, MSDS, IEC62133, and RoHS.

Quality Control: 100% factory inspection on OCV (Open Circuit Voltage), Internal Resistance, and physical dimensions.

Safe Packaging: Anti-static trays housed within UN-approved dangerous goods (DG) export cartons.

Reliable Shipping: Support for air freight, sea freight, and express couriers with full customs documentation provided.

Our Certification

We possess CCC certification, ISO 9001 quality system certification, KC certification, UL certification, compliance with RoHS standards, and two invention patents and utility model patents.

p2025021109571315942