Introduction
The LP-402025-1S-3 is a compact lithium polymer (LiPo) battery designed for consumer electronics applications. This case study examines its technical specifications, performance characteristics, and suitability for modern portable devices.
Technical Specifications
Model: LP-402025-1S-3
Battery Type: Lithium Polymer (LiPo)
Voltage: 3.7V
Capacity: 155mAh
Configuration: Single cell (1S)
Dimensions: 40mm × 20mm × 2.5mm (typical slim profile for wearables)
Weight: Approximately 5-8 grams (estimated based on similar cells)
Cycle Life: 300-500 cycles (industry standard for consumer LiPo)
Charge Rate: 0.5C recommended (77.5mA max charge current)
Discharge Rate: 1C continuous (155mA max discharge current)
Performance Characteristics
Energy Density: The 155mAh capacity provides sufficient energy for small devices while maintaining a slim form factor. This energy density makes it ideal for:
Wearable health monitors
Bluetooth earphones
Miniature IoT sensors
Compact medical devices
Charge/Discharge Behavior
Advantages Over Alternatives
vs NiMH Batteries: Higher energy density, no memory effect
vs Li-ion Cylindrical Cells: More flexible form factor options
vs Supercapacitors: Higher energy storage capacity
Discharge Considerations
Avoid deep discharges (<3.0V) to prolong lifespan
High current bursts should be limited to <5 seconds
Storage at 40-60% charge recommended for long-term storage
Real-world Application Example
Smartwatch Implementation
Device: Mid-range smartwatch with always-on display
Battery: LP-402025-1S-3 (155mAh)
Cycle Life Considerations
More frequent replacements than primary batteries
Requires proper end-of-life recycling
Future Development Considerations
Higher Capacity Variants: Developing 200mAh version in same form factor
Fast Charging Improvements: Optimizing charge acceptance for 1C charging
Safety Enhancements: Implementing advanced protection algorithms
Environmental Improvements: Developing more sustainable materials