ASOL 381922 Lithium Polymer Battery — A compact 180mAh soft-pack Li-Po delivering 0.666Wh energy in an ultra-thin 3.9mm profile with a super-narrow 19.5×25mm footprint. This is one of ASOL’s narrowest standard cells, purpose-built for ultra-narrow wearable and portable devices: smart rings, GPS trackers, Bluetooth earbuds cases, smart bracelets, and medical wearables.
Why 19.5mm Ultra-Narrow Matters — Width Comparison
| Device Type | Typical Internal Cavity Width | ASOL 381922 19.5mm Fit |
|---|---|---|
| ITC Hearing Aid | 15~20mm | ✅ Perfect match |
| Vape Device / Pod Mod | 18~22mm | ✅ Perfect match |
| Pod-Style E-Cigarette | 16~20mm | ✅ Perfect match |
| TWS Earbud Stem | 20~28mm | ✅ Slim stem suitable |
| Smart Ring | 16~22mm | ✅ Suitable |
| Smart Badge | 18~25mm | ✅ Suitable |
Standard batteries at 25~35mm wide simply won’t fit these narrow enclosures. The 381922’s 19.5mm width is the key to unlocking these applications.
Why Lithium Polymer vs Coin Cell?
- 📏 19.5mm Ultra-Narrow Width — Among ASOL’s narrowest batteries; the only choice for ITC hearing aids and pod vapes
- 📐 3.9mm Ultra-Thin Profile — Fits slim and curved wearable enclosures
- 🔋 180mAh vs Coin Cell — 5× the capacity of a CR2016 coin cell (≈35mAh) in a comparable narrow form
- ⚡ 1C Balanced Power — 180mA continuous delivery suits compact device load profiles
- 🪶 Featherweight Soft Pack — Aluminum-laminated construction minimizes device weight
- 🔧 Flexible Integration — Adapts to irregular pod and ITC enclosures
- 🏭 OEM-Friendly — Custom tabs, wires, connectors, and PCM available
Key Features
- 🔋 180mAh / 0.666Wh Compact Power — High energy density in ASOL’s narrowest form factor
- 📏 19.5mm Ultra-Narrow Width — Among the narrowest ASOL cells; purpose-built for pod and ITC devices
- 📐 Ultra-Thin 3.9mm Profile — Fits slim and curved enclosures
- ⚡ 180mA Max 1C Discharge — Continuous power delivery for compact devices
- 🔄 ≥500 Cycle Life — Reliable long-term performance with minimal degradation
- 🌡️ Wide Temperature Range — Discharge -20
60°C, charge 045°C - 🛡️ UN38.3 Certified — Safe for global air transport
- 🔧 OEM/ODM Ready — Custom tabs, wires, connectors, protection circuits
Specifications
| Parameter | Value |
|---|---|
| Model | 381922 |
| Chemistry | Lithium Polymer (Li-Po) Soft Pack |
| Nominal Voltage | 3.7V |
| Nominal Capacity | 180mAh |
| Nominal Energy | 0.666Wh |
| Dimensions (T×W×H) | 3.9×19.5×25mm |
| Charge Voltage | 4.2V |
| Standard Charge Current | 36mA (0.2C) |
| Max Charge Current | 180mA (1C) |
| Standard Discharge Current | 36mA (0.2C) |
| Max Discharge Current | 180mA (1C, continuous) |
| Charge Cut-off | 4.2V |
| Discharge Cut-off | 2.5V |
| 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.) | ~4.0g |
| Certifications | UN38.3 |
Applications
⭕ Smart Ring
- Smart Ring — 19.5mm ultra-narrow width is the perfect fit for ring-shaped wearables; 3.9mm thin profile follows finger contour; 180mAh supports 3–5 days of typical use
- Fitness Ring
- Sleep Tracking Ring
- Health Monitoring Ring
📍 GPS Tracker
- GPS Tracker / Pet Tracker — Compact 19.5×25mm form fits small tracking enclosures; 180mAh enables 5–10 days of location reporting
- Personal Tracker
- Asset Tracker
- Mini Key Finder
🎧 Bluetooth Earbuds Case
- Bluetooth Earbuds Charging Case — 19.5mm narrow width fits slim charging case designs; 180mAh provides 1–2 full recharge cycles for standard Bluetooth earbuds
- TWS Charging Case
- Wireless Earbuds Case
- Neckband Earphone Case
⌚ Smart Bracelet
- Smart Bracelet / Fitness Band — Ultra-slim 3.9mm profile fits bracelet cavities; 180mAh supports 5–7 days of typical use
- Fitness Tracker
- Sleep Monitoring Band
- Health Wristband
🏥 Medical Wearable
- Medical Wearable — 19.5mm narrow width fits medical monitoring bands; 180mAh supports 1–3 days of continuous health monitoring
- Wearable Pulse Oximeter
- Continuous Glucose Monitor (CGM)
- Remote Patient Monitoring Device
- Smart Patch
Why Choose ASOL 381922?
The ultra-narrow solution — The ASOL 381922 delivers 180mAh (0.666Wh) in a super-narrow 19.5mm width at just 3.9mm thin — ASOL’s narrowest standard cell for ultra-narrow wearable and portable devices. Whether powering a smart ring, a GPS tracker, a Bluetooth earbuds case, a smart bracelet, or a medical wearable, the 381922 is the battery that finally fits.
UN38.3 certified for global logistics — The 381922 is UN38.3 certified, ensuring safe air transport worldwide. ASOL’s OEM/ODM team supports custom tabs, wire harnesses, connectors, and PCM protection circuit integration.
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 certification 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 |
