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
Ultra-narrow power for slim devices
High energy density in ASOL’s narrowest form factor.
Among the narrowest ASOL cells; built for pod and ITC devices.
Fits slim and curved enclosures.
Continuous power delivery for compact devices.
Reliable long-term performance with minimal degradation.
Discharge −20–60°C, charge 0–45°C.
Safe for global air transport.
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
Where the 381922 is used
19.5mm narrow & 3.9mm thin fit; 3–5 days per charge
Compact 19.5×25mm form; 5–10 days location reporting
Slim TWS charging case; 1–2 full recharge cycles
Ultra-slim 3.9mm fits fitness bands; 5–7 days use
Fits monitoring bands; 1–3 days continuous tracking
Why ASOL
Factory-direct, fully customizable
Connector, wire gauge, heat-shrink color, custom brand label, BMS & housing.
Integrated PCB against overcharge, over-discharge, overcurrent & short circuit.
Grade-A cells, voltage-matched ±10mV for stable, reliable performance.
Custom prototype samples in 5–7 business days before volume production.
Every unit tested for OCV, capacity & protection. Defect rate <0.3%.
UN38.3 Class 9 air & sea · DHL/FedEx/UPS · EXW/FOB/CIF/DDP.
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.
❓ Frequently Asked Questions
What are the key specifications of the ASOL 381922 3.7V 180mAh Lithium Polymer Battery?
The ASOL 381922 3.7V 180mAh Lithium Polymer Battery is a 3.7V 180mAh lithium battery, measuring 3.9×19.5×25mm, weighing ~4.0g.
What devices or applications is the ASOL 381922 3.7V 180mAh Lithium Polymer Battery suitable for?
Typical applications include Device Type, ITC Hearing Aid, Vape Device / Pod Mod, Pod-Style E-Cigarette, TWS Earbud Stem and Smart Ring. Custom configurations for other devices are available on request.
What is the maximum discharge current of the ASOL 381922 3.7V 180mAh Lithium Polymer Battery?
The ASOL 381922 3.7V 180mAh Lithium Polymer Battery supports a maximum continuous discharge current of 180mA.
How many charge cycles does the ASOL 381922 3.7V 180mAh Lithium Polymer Battery last?
The ASOL 381922 3.7V 180mAh Lithium Polymer Battery is rated for ≥500 cycles, retaining strong capacity across its service life.
What safety certifications does the ASOL 381922 3.7V 180mAh Lithium Polymer Battery have?
It is certified to UN38.3, and full test reports can be provided on request.
Does ASOL offer OEM/ODM customization for the ASOL 381922 3.7V 180mAh Lithium Polymer Battery?
Yes. As a lithium battery manufacturer, ASOL provides full OEM/ODM customization — capacity, voltage, cell configuration, connector type, wire length, and label printing can all be tailored to your application and order volume.
Can I get a free sample or a quote for the ASOL 381922 3.7V 180mAh Lithium Polymer Battery?
Yes. Free samples are available — you only cover the shipping cost. Email info@asolbattery.com or message +86 15779858703 on WhatsApp for a quote — ASOL typically responds within 4 hours on business days.
Contact Us
| Channel | Information |
|---|---|
| info@asolbattery.com | |
| +86 157 7985 8703 | |
| 🌐 Website | www.asolbattery.com |
| ⏰ Response Time | Within 24 hours on working days |
Need a different size or capacity? Explore ASOL’s full lithium polymer battery range →
