ASOL 505573 Lithium Polymer Battery — A premium 9-certified soft-pack Lithium Polymer 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
Slim soft-pack power, certified worldwide
2500mAh / 9.25Wh in a compact 7.6mm-thin soft-pack.
Aluminum-laminated polymer construction, lightweight and flexible.
Enables sleek, modern design for portable devices.
Consistent performance throughout the entire discharge cycle.
Long service life with minimal capacity fade.
UN38.3 certified for air transport worldwide.
Charge: 0–45°C / Discharge: -20–55°C.
Tabs, wires, connectors, or fully custom form.
Safe for air transport; full documentation provided.
Specifications
| Parameter | Value |
|---|---|
| Model | 505573 |
| Cell Type | Lithium Polymer (Lithium Polymer) 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 | ≥50mΩ |
| 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 | UN38.3 |
Applications
Where the 505573 is used
TWS earbud cases & speakers — 2500mAh for 3-4 recharges.
E-ink readers, smart writing tablets and e-paper displays.
Asset, pet & vehicle locators plus Bluetooth item finders.
Smart lock backup, doorbells, hubs and sensor power.
Facial cleansers, mini massage guns and skincare devices.
Handheld consoles, mini arcades and gaming controllers.
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.
Sample evaluation may be available for selected cylindrical and lithium polymer battery projects, subject to specification review and product availability. Sample freight is paid by the customer.
Inspection requirements and acceptance criteria are confirmed for each project before order release.
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 |
Custom specifications are welcome. Sample evaluation may be available for selected cylindrical and lithium polymer battery projects, subject to specification review and product availability. Sample freight is paid by the customer. Full certification documentation (UN38.3) provided with every order.
Frequently Asked Questions
What are the key specifications of the ASOL 505573 3.7V 2500mAh Lithium Polymer Battery Cell?
The ASOL 505573 3.7V 2500mAh Lithium Polymer Battery Cell is a 3.7V 2500mAh lithium battery, built in a 1S1P configuration, weighing ~45g.
What is the maximum discharge current of the ASOL 505573 3.7V 2500mAh Lithium Polymer Battery Cell?
The ASOL 505573 3.7V 2500mAh Lithium Polymer Battery Cell supports a maximum continuous discharge current of 2500mA.
What safety certifications does the ASOL 505573 3.7V 2500mAh Lithium Polymer Battery Cell have?
It is certified to UN38.3; certification documents are available to verified buyers.
Does ASOL offer OEM/ODM customization for the ASOL 505573 3.7V 2500mAh Lithium Polymer Battery Cell?
Yes. ASOL is a battery manufacturer, so capacity, voltage, cell configuration, connectors, wire length and custom labeling can all be built to your specification and order volume under OEM or ODM terms.
Can I get a sample or a quote for the ASOL 505573 3.7V 2500mAh Lithium Polymer Battery Cell?
Sample evaluation may be available for selected cylindrical and lithium polymer battery projects, subject to specification review and product availability. Sample freight is paid by the customer. Reach us at info@asolbattery.com or +86 15779858703 on WhatsApp for pricing; we usually reply within 24 hours on working 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 →
