Product Description
Lithium Polymer Battery Cell 502030 3.7v 250mAh Lipo Batteries For Bluetooth Speaker
| NO. | Items | Specifications |
| 1 | batteries | 3.7v 250mah lipo battery |
| 2 | Charge voltage | 4.2V |
| 3 | Nominal voltage | 3.7V |
| 4 | Nominal capacity | 250mAh 0.2C Discharge |
| 5 | Charge current
| Standard Charging:0.5C
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 | 1.0C |
| 9 | Max.discharge current | 1.0C |
| 10 | Discharge cut-off voltage | 2.75V(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: 50±2mm (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 | ≥500times |
Main Features:
Ultra-Thin & Compact Form Factor: With dimensions of 5mm (thickness) × 20mm (width) × 30mm (length) and a typical weight of 4–6g, it features an ultra-slim, miniaturized design—perfect for devices with strict space constraints (e.g., thin wearables, Mini sensors).
Balanced Electrical Performance: Boasts a nominal voltage of 3.7V (working voltage range: 3.0V–4.2V) and 250mAh capacity (0.925Wh energy), striking a balance between runtime and size. It meets the power needs of low-to-medium power devices, avoiding the short standby time of 200mAh batteries and the bulk of 300mAh+ models.
Reliable Safety Protection: Adopts a soft-package lithium battery structure with a built-in protection IC. It effectively prevents overcharge, over-discharge, short circuits, and overcurrent, reducing risks of swelling or thermal damage. It complies with common safety standards for consumer electronics.
Durable Cycle Life: Supports 300–500 charge-discharge cycles (under standard conditions: 0.5C charge/discharge, 25℃ environment). After 300 cycles, it retains over 80% of its initial capacity, ensuring long-term stable use for devices like wearables or sensors.
Low Self-Discharge Rate: Loses only 5%–8% of capacity per month at room temperature. This makes it suitable for devices that require occasional use or long standby (e.g., emergency sensors, backup power for small gadgets), as it avoids frequent recharging.
Wide Environmental Adaptability: Operates stably in a temperature range of -10℃–60℃ (discharge) and 0℃–45℃ (charge). It can adapt to indoor/outdoor use scenarios, such as outdoor mini sensors or cold-region wearable devices.
Main Application:
Mini Wearable Devices:
Children’s basic smartwatches (focus on positioning and call functions, no need for large capacity, emphasizing slim design).
Mini health monitors (e.g., portable oximeter, single-function heart rate trackers) — lightweight and small size fit comfortably on fingers/wrists.
Smart jewelry (e.g., mini smart bracelets, smart rings with simple notification functions) — ultra-thin structure matches jewelry’s aesthetic and wearing comfort.
IoT Micro Sensors:
Smart home mini sensors (e.g., door/window contact sensors, mini temperature/humidity sensors for cabinets) — low power consumption, 250mAh capacity supports 3–6 months of standby.
Industrial mini sensors (e.g., micro pressure sensors for small pipelines, asset tracking tags for small items) — compact size fits into narrow installation spaces.
Agricultural micro sensors (e.g., mini soil moisture sensors for potted plants) — lightweight and easy to embed in soil without affecting plant growth.
Small Consumer Electronics:
Wireless earbud charging cases (auxiliary power supply, supplementing the case’s internal battery to extend earbuds’ total usage time).
Mini digital devices (e.g., portable mini voice recorders, ultra-small Bluetooth remote controls for cameras/PPTs) — small size reduces device bulk, 250mAh capacity meets 5–10 hours of continuous use.
Portable mini LED lights (e.g., keychain LED lights, camping mini lanterns) — lightweight and easy to carry, supporting 8–12 hours of low-brightness lighting.
Medical & Emergency Gadgets:
Fingertip mini blood glucose meters (home-use, low power consumption, 250mAh capacity supports 50–100 test cycles).
Emergency mini devices (e.g., portable mini alarms, mini GPS locators for the elderly/children) — long standby time ensures timely use in emergencies.
Mini Toys & Models:
Micro remote-controlled (RC) toys (e.g., mini RC cars, mini drones under 50g) — lightweight battery avoids affecting toy maneuverability, 250mAh capacity supports 15–30 minutes of playtime.
Electronic educational toys (e.g., mini coding robots, small electronic building blocks) — safe and compact, matching the toy’s miniaturized design.
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