ASOL 501525 Lithium Polymer Battery — An ultra-compact rechargeable Li-Po soft pack battery engineered for miniaturized electronic devices and IoT applications. Delivering 150mAh (0.555Wh) in a slim 5.2mm profile (15.5mm × 28mm footprint), this battery is the perfect power solution for Bluetooth item trackers, GPS trackers (personal, pet, and asset), smart tags, TWS earbuds, smart door locks, digital thermometers, and other compact IoT devices. The PVC-shelled soft pack design features built-in protection circuitry (over-charge, over-discharge, over-current, short-circuit), ensuring safe and reliable operation in sealed electronic enclosures. Its compact square footprint and ultra-slim profile make it the go-to battery for product designers creating next-generation smart home and wearable devices.
🔋 Why Polymer vs Cylindrical?
Unlike traditional cylindrical batteries, lithium polymer batteries offer:
- 📏 Compact Square Form — Fits precisely into slim rectangular and square device enclosures
- 🔄 Flexible Shape — Adapts to custom compact enclosures in smart home and IoT devices
- 🪶 Lightweight — Critical for wearable trackers and portable IoT devices
- 🔒 No Pressure Vents — Safer for sealed smart home and tracking devices
- ⚡ Higher Energy Density — Maximum power in minimal space for all-day battery life
- 🛠️ OEM-Friendly Customization — Tabs, wires, connectors, and protection circuits available
Key Features
Slim 150mAh power for compact IoT
150mAh (0.555Wh) powers Bluetooth trackers, GPS, and IoT gadgets.
Over-charge, over-discharge, over-current, and short-circuit protection.
PVC-shelled aluminum-laminated polymer, lightweight and compact.
Engineered for slim rectangular and square device enclosures.
≤200mΩ AC impedance for efficient, stable power delivery.
Long service life with minimal capacity fade over time.
Charge 0~45°C · Discharge -20~60°C · Storage -10~35°C.
Available with tabs, wires, connectors, or custom connectors.
Safe for air transport worldwide.
Custom dimensions, capacity, connectors, protection, and branding.
Technical Specifications
| Parameter | Value |
|---|---|
| Model | 501525 |
| Cell Type | Lithium Polymer (Li-Po) Soft Pack |
| Shell Material | PVC |
| Nominal Voltage | 3.7V |
| Nominal Capacity | 150mAh |
| Energy | 0.555Wh |
| Dimensions | 5.2mm × 15.5mm × 28mm (Max) (T×W×H) |
| Thickness | 5.2mm |
| Configuration | 1S1P |
| AC Impedance | ≤200mΩ |
| Charge Voltage | 4.2V |
| Standard Charge Current | 75mA (0.5C) |
| Max Charge Current | 150mA (1C) |
| Discharge Cut-off | 2.75V |
| Max Discharge Current | 150mA (1C) |
| Charge Temperature | 0~45°C |
| Discharge Temperature | -20~60°C |
| Storage Temperature | -10~35°C (recommended for long-term storage) |
| Cycle Life | ≥500 cycles |
| Protection | Over-charge, Over-discharge, Over-current, Short-circuit |
| Certifications | UN38.3 |
Applications
Where the 501525 is used
Bluetooth item finders, GPS trackers, smart tags and BLE beacons.
Smart door locks, padlocks, access fobs and security sensors.
TWS earbuds, mini speakers and hearing amplifiers.
Thermometers, oximeters, BP monitors and portable ECGs.
Bike computers, GPS watches, action cameras and rangefinders.
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 |
| 1000+ pcs | Contact us | 15% off |
Sample orders and custom specifications are welcome. Contact us for detailed pricing and lead times.
❓ Frequently Asked Questions
What are the key specifications of the ASOL 501525 3.7V 150mAh Lithium Polymer Battery?
The ASOL 501525 3.7V 150mAh Lithium Polymer Battery is a 3.7V 150mAh lithium battery, built in a 1S1P configuration, measuring 5.2mm × 15.5mm × 28mm.
What is the maximum discharge current of the ASOL 501525 3.7V 150mAh Lithium Polymer Battery?
The ASOL 501525 3.7V 150mAh Lithium Polymer Battery supports a maximum continuous discharge current of 150mA.
How many charge cycles does the ASOL 501525 3.7V 150mAh Lithium Polymer Battery last?
The ASOL 501525 3.7V 150mAh Lithium Polymer Battery is rated for ≥500 cycles, well beyond the lifespan of a comparable standard cell.
What safety certifications does the ASOL 501525 3.7V 150mAh Lithium Polymer Battery have?
It is certified to UN38.3; certification documents are available to verified buyers.
Does ASOL offer OEM/ODM customization for the ASOL 501525 3.7V 150mAh Lithium Polymer Battery?
Yes. ASOL is a battery manufacturer, so capacity, voltage, cell configuration, connectors, wire length and custom labelling can all be built to your specification and order volume under OEM or ODM terms.
Can I get a free sample or a quote for the ASOL 501525 3.7V 150mAh Lithium Polymer Battery?
Yes — samples are free and you simply cover the freight. Reach us at info@asolbattery.com or +86 15779858703 on WhatsApp for pricing; we usually reply within 4 working hours.
Contact Us
| Channel | Information |
|---|---|
| info@asolbattery.com | |
| +86 15779858703 | |
| 🌐 Website | www.asolbattery.com |
| ⏰ Response Time | 24 Hours on Working Days |
Need a different size or capacity? Explore ASOL’s full lithium polymer battery range →
