Product Description
Rechargeable Lithium Ion Polymer Battery 502025 3.7V 200mAh Lipo Batteries For Earphone
| NO. | Items | Specifications |
| 1 | batteries | 3.7v 200mah lipo battery |
| 2 | Charge voltage | 4.2V |
| 3 | Nominal voltage | 3.7V |
| 4 | Nominal capacity | 200mAh 0.2C Discharge |
| 5 | Charge current
| Standard Charging:0.2C
Rapid charge: 1.0C |
| 6 | 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 |
| 7 | Charging time
| Standard Charging:2.75hours(Ref.)
Rapid charge: 2hours(Ref.) |
| 8 | Max.charge current | 0.5C |
| 9 | Max.discharge current | 1.0C |
| 10 | Discharge cut-off voltage | 2.5V0.25V(0.2C) |
| 11 | Operating temperature | Charging: 0 °C ~45 °C
Discharging:0 °C ~45 °C |
| 12 | Storage temperature | -10°C~ +45 °C |
| 13 | Dimension | Length:25±0.5mm (not including tabs)
Width:20±0.5mm
Thickness:5±0.2mm |
| 14 | Drop Test | The cell is to be dropped from a height of meter twice onto concrete ground. No fire, no leakage |
| 15 | cycle time | ≥800times |
Main Selling Points:
Compact & Space-Saving Design: With dimensions of 5mm (thickness) × 20mm (width) × 25mm (length), the 502025 battery features an ultra-slim and miniaturized form factor, ideal for devices with limited internal space.
Stable Voltage Output: Delivers a consistent 3.7V nominal voltage, matching the power requirements of most small electronic devices, ensuring stable performance during operation.
Optimal Capacity for Mini Devices: 200mAh capacity provides sufficient runtime for low-power gadgets (e.g., wearable trackers, small sensors) without adding excessive weight.
High Safety Performance: Adopts lithium-polymer chemistry with built-in protection against overcharge, over-discharge, short circuits, and thermal runaway, reducing safety risks.
Long Cycle Life: Supports 300–500 charge-discharge cycles (under standard usage conditions), offering durable power supply for long-term device use.
Low Self-Discharge Rate: Maintains over 90% of its capacity after 1 month of storage (at room temperature), suitable for devices that require occasional or standby power.
Lightweight Advantage: Weighs only 3–5 grams (typical), minimizing the overall weight of portable devices—critical for wearables and miniaturized electronics.
Key Applications
Mini Wearable Devices: Children’s smartwatches, ultra-small fitness trackers, mini health monitors (e.g., heart rate sensors for sports gear).
Portable Medical Gadgets: Fingertip pulse oximeters, mini blood glucose testers, small handheld thermometers (low power consumption, compact size demand).
IoT & Smart Sensors: Wireless mini sensors (e.g., temperature/humidity sensors for smart homes, asset tracking tags), Bluetooth low-energy (BLE) beacons.
Small Consumer Electronics: Wireless earbud charging cases (auxiliary power), mini Bluetooth speakers, portable USB fans, small remote controls (e.g., for toys or mini drones).
Toys & Mini Models: Micro remote-controlled (RC) cars/planes, mini robotic kits, electronic educational toys (requires lightweight, small-sized batteries).
Backup Power for Micro Devices: Emergency backup power for mini GPS trackers, small USB-powered LED lights, or portable Wi-Fi hotspots (short-term backup needs).
Product Picures:
