ASOL 303030 Lithium Polymer Battery — An ultra-compact 250mAh soft-pack Li-Po battery delivering 0.925Wh energy in an ultra-thin 3.1mm profile. With its miniature 30.5×32.5mm square footprint, this battery is engineered for the smallest device enclosures: TWS earbuds, smart rings, hearing aids, mini Bluetooth earphones, small GPS trackers, mini remote controls, and ultra-compact IoT devices.
Why Lithium Polymer vs Cylindrical?
- 📐 Ultra-Thin & Compact — 3.1mm thickness + 30.5×32.5mm fits the smallest device enclosures
- 📏 Square Form Factor — Efficient space utilization in tiny devices
- 🔋 Micro High Density — 250mAh in a miniature package for small device runtime
- ⚡ Balanced 1C Power — 250mA continuous charge/discharge supports micro device needs
- 🪶 Featherweight — Aluminum-laminated soft pack minimizes device weight
- 🔧 Flexible Integration — Adapts to ultra-compact and irregular enclosures
- 🏭 OEM-Friendly — Custom tabs, wires, connectors, and PCM available
Key Features
- 🔋 250mAh / 0.925Wh Micro Power — High energy density for ultra-compact devices
- 📐 Ultra-Thin 3.1mm Profile — Fits ultra-thin device enclosures
- 📏 Compact 30.5×32.5mm Footprint — Designed for miniature devices
- ⚡ 250mA Max 1C Discharge — Continuous power delivery for micro devices
- 🔌 Low Impedance ≤200mΩ — Efficient energy transfer
- 🔄 ≥500 Cycle Life — Reliable long-term performance
- 🌡️ Wide Temperature Range — Discharge -20
60°C, charge 045°C - 🔧 OEM/ODM Ready — Custom tabs, wires, connectors, protection circuits
Specifications
| Parameter | Value |
|---|---|
| Model | 303030 |
| Chemistry | Lithium Polymer (Li-Po) Soft Pack |
| Nominal Voltage | 3.7V |
| Nominal Capacity | 250mAh |
| Nominal Energy | 0.925Wh |
| Dimensions (T×W×H) | 3.1×30.5×32.5mm |
| Impedance | ≤200mΩ |
| Charge Voltage | 4.2V |
| Standard Charge Current | 50mA (0.2C) |
| Max Charge Current | 250mA (1C) |
| Standard Discharge Current | 50mA (0.2C) |
| Max Discharge Current | 250mA (1C, continuous) |
| Charge Cut-off | 4.2V |
| Discharge Cut-off | 3.0V |
| Charge Temperature | 0~45°C |
| Discharge Temperature | -20~60°C |
| Storage Temperature | -20~45°C (recommended) |
| Cycle Life | ≥500 cycles (100% DOD, 0.2C, 25°C) |
| Weight (Approx.) | ~6g |
Applications
🎧 Audio & Wearables (Top Match)
- TWS Earbuds — Perfect fit: 3.1mm ultra-thin slides into compact earbud cases; 250mAh provides 3-4 full charges
- Mini Bluetooth Earphones
- Compact Smart Watches
- Smart Rings
- Wireless Earbuds
🦻 Health & Medical
- Hearing Aids — Ultra-compact size ideal for in-ear hearing devices
- Mini Hearing Amplifiers
- Personal Sound Amplifiers
- Compact Medical Sensors
📍 Tracking & Location
- Small GPS Trackers — Miniature size for pet collars, asset tracking
- Bluetooth Item Finders
- Key Locators
- Mini Asset Tags
🎮 Controls & Remotes
- Mini Remote Controls — TV remotes, smart home remotes
- Bluetooth Presenter Remotes
- Mini Game Controllers
- Wireless Clickers
🌀 Small Electronics
- Mini Fans — Pocket fans, handheld mini fans
- LED Lights (mini)
- Small Toys
- Electronic Candles
🔐 Smart Home & IoT
- Smart Door Lock (mini backup)
- Wireless Sensors
- Mini Smart Home Devices
Why Choose ASOL 303030?
Ultra-compact professional power — The ASOL 303030 delivers 250mAh (0.925Wh) in an ultra-thin 3.1mm profile with a compact 30.5×32.5mm footprint — engineered specifically for the smallest portable and wearable devices. Whether powering a TWS earbud, a smart ring, or a hearing aid, this battery provides reliable micro power without compromising device design.
ASOL’s OEM/ODM team supports custom tabs, wire harnesses, connectors, and PCM protection circuit integration for your specific device requirements.
Wholesale Pricing
| Quantity | Unit Price | Savings |
|---|---|---|
| 100–499 pcs | Contact us | — |
| 500–999 pcs | Contact us | 8% off |
| 1,000–4,999 pcs | Contact us | 15% off |
| 5,000+ pcs | Contact us | 20%+ off |
📌 Wholesale Note: Sample orders and custom specifications welcome. Full documentation provided with shipment.
Contact Us
| Channel | Information |
|---|---|
| info@asol-battery.com | |
| +86 157 7985 8703 | |
| 🌐 Website | www.asol-battery.com |
| ⏰ Response Time | Within 24 hours on working days |
