ASOL 505573 Lithium Polymer Battery — A premium 9-certified soft-pack Li-Po battery engineered for next-generation portable electronics. The 7.6mm ultra-slim profile enables sleek, modern product aesthetics while delivering 2500mAh (9.25Wh) of reliable power. Its flat, square-ish 50.5×55.5mm form factor is purpose-built for devices requiring a stable, wide battery footprint — POS terminals, TWS charging cases, e-readers, and smart home controllers alike.
🔋 Why Lithium Polymer vs Cylindrical Cells?
Unlike traditional cylindrical batteries (e.g. 18650), lithium polymer soft-pack cells offer decisive advantages for modern compact consumer devices:
- 📏 Thinner Profile — As low as 3mm thickness vs minimum 18mm for 18650
- 🔄 Flexible Shape — Adapts to custom enclosures, curved designs, and irregular cavities
- 🪶 Lighter Weight — Up to 30% lighter than equivalent-capacity cylindrical cells
- 🔒 No Pressure Vents — Safer for compact sealed devices with limited venting
- ⚡ Higher Energy Density — Maximizes capacity in minimal physical space
- 🔧 OEM-Friendly Customization — Tabs, wires, connectors, and form factor tailored to your product
Key Features
- 🔋 High Energy Density — 2500mAh / 9.25Wh in a compact 7.6mm-thin soft-pack
- 📦 Soft Pack Design — Aluminum-laminated polymer construction, lightweight and flexible
- 📐 Ultra-Slim 7.6mm Profile — Enables sleek, modern industrial design for portable devices
- ⚡ Stable Voltage Output — Consistent performance throughout the entire discharge cycle
- 🔄 300+ Cycles — Long service life with minimal capacity fade under normal use
- 🔒 9-Certified for Global Markets — IEC62133 (EU), UL1642 (US), KC (Korea), PSE (Japan), CB (Europe), BIS (India), CQC (China), UN38.3 (air transport)
- 🌡️ Wide Operating Range — Charge: 0~45°C / Discharge: -20~55°C
- ⚙️ OEM/ODM Support — Available with tabs, wires, connectors, or fully custom form
- 🛡️ UN38.3 Certified — Safe for air transport; full documentation provided
Specifications
| Parameter | Value |
|---|---|
| Model | 505573 |
| Cell Type | Lithium Polymer (Li-Po) Soft Pack |
| Nominal Voltage | 3.7V |
| Nominal Capacity | 2500mAh |
| Energy | 9.25Wh |
| Thickness (T) | 7.6mm (Max) |
| Width (W) | 50.5mm (Max) |
| Length (H) | 55.5mm (Max) |
| Configuration | 1S1P |
| Impedance | ≤150mΩ |
| Charge Voltage | 4.2V |
| Standard Charge Current | 500mA (0.2C) |
| Max Charge Current | 2500mA (1C) |
| Standard Discharge Current | 500mA (0.2C) |
| Max Discharge Current | 2500mA (1C, continuous) |
| Discharge Cut-off | 2.5V |
| Charge Temp | 0~45°C |
| Discharge Temp | -20~55°C |
| Storage Temperature | -10~35°C |
| Cycle Life | 300+ cycles (100% DOD, 1C, 25°C) |
| Weight | Approx. 45g |
| Certifications | IEC62133, UL1642, KC, PSE, CB, BIS, CQC, UN38.3 |
Applications
🎧 Audio & Wearables
- TWS Earbuds & Charging Cases — Perfect match: 2500mAh handles 3-4 full charges
- Portable Bluetooth Speakers (compact models)
- Wireless Earbuds & Headphones
- Smart Watch Charging Docks
📖 E-Readers & Digital Notepads
- E-ink e-readers (Kindle, Kobo, Boox compatible)
- Digital notepads & smart writing tablets
- E-paper displays & digital planners
- Children’s e-reading devices
📍 GPS & Location Tracking
- GPS Trackers & Navigators
- Asset Tracking Devices
- Pet & Vehicle GPS Locators
- Bluetooth Item Finders
🔐 Smart Home & Security
- Smart Door Lock Backup Batteries
- Doorbell Indoor Units
- Smart Home Hub Controllers
- Security Sensor Backup Power
💆 Beauty & Personal Care
- Facial Cleansing Devices
- Mini Massage Guns (compact)
- Beauty & Skincare Devices
- Teeth Whitening Devices
🎮 Gaming & Entertainment
- Handheld Retro Game Consoles
- Mini Arcade Machines
- Portable Gaming Controllers
- TV Remote Controls (premium)
🏥 Health & Medical
- Portable Blood Pressure Monitors
- Digital Thermometers
- Pulse Oximeters
- Portable Nebulizers
Why Choose ASOL Li-Po Batteries?
ASOL Battery combines cutting-edge lithium polymer cell engineering with rigorous quality assurance across every production batch. The 505573 is one of our most versatile mid-capacity models — its flat, square-ish 50.5×55.5mm form factor fits a wide range of portable electronics where a stable, wide battery footprint is preferred over cylindrical or tall narrow packs.
With 9 international certifications covering 8 major markets — IEC62133 (EU), UL1642 (North America), KC (Korea), PSE (Japan), CB (Europe), BIS (India), CQC (China), UN38.3 (global air transport) — ASOL batteries are pre-cleared for simultaneous deployment across multiple regions with a single product SKU. Our dedicated OEM/ODM team supports custom tabs, wiring harnesses, connector integration, and PCM (protection circuit module) assembly, so you receive a battery ready to drop into production.
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 |
📌 Sample orders and custom specifications welcome. Full certification documentation (IEC62133, UL1642, KC, PSE, CB, BIS, CQC, UN38.3) provided with every order.
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 |
