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
- 📍 Compact 150mAh Capacity — 150mAh (0.555Wh) powers Bluetooth trackers, GPS devices, and IoT gadgets
- 🛡️ Built-in Protection Circuit — Over-charge, over-discharge, over-current, and short-circuit protection for safe operation
- 📦 Soft Pack Design — PVC-shelled aluminum-laminated polymer, lightweight and compact
- 📐 Ultra-Slim 5.2mm Profile — Engineered for slim rectangular and square device enclosures
- ⚡ Low Internal Resistance — ≤200mΩ AC impedance for efficient and stable power delivery
- 🔄 500+ Cycles — Long service life with minimal capacity fade over time
- 🌡️ Wide Temperature Range— Charge: 0~45°C / Discharge: -20~60°C / Storage: -10~35°C
- 🔧 Custom Integration — Available with tabs, wires, connectors, or custom connectors
- ✅ UN38.3 Certified — Safe for air transport worldwide
- 🏭 OEM/ODM Support — Custom dimensions, capacity, connectors, protection circuits, and branding available
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
| 📍 Tracking | 🔐 Smart Home | 🎧 Audio | 🏥 Health | 🚴 Sports |
|---|---|---|---|---|
| Bluetooth Trackers | Smart Door Locks | TWS Earbuds | Digital Thermometers | Bike Computers |
| GPS Trackers | Smart Padlocks | Portable Speakers | Blood Pressure Monitors | Bike Speed Sensors |
| Smart Tags | Access Control Fobs | Hearing Amplifiers | Body Fat Scales | GPS Running Watches |
| Asset Trackers | Home Security Sensors | Mini Speakers | Pulse Oximeters | Sports Cameras |
| BLE Beacons | Door/Window Sensors | Wireless Keyboards | Portable ECG Monitors | Waterproof Flashlights |
📍 Tracking & Item Finding
Bluetooth item finders (AirTag-style), smart key finders, wallet trackers, luggage tags, tablet finder tags, smart card trackers, pet GPS collars, asset GPS trackers, vehicle GPS units, smart card locks
🔐 Smart Home & Security
Smart fingerprint door locks, smart card door locks, Bluetooth door locks, keypad electronic locks, smart padlocks, anti-theft alarm tags, smart safe locks, gate controller remotes, access control fobs, home security sensors, door/window sensors
🎧 Audio & Personal Electronics
TWS (True Wireless Stereo) earbuds, single-ear Bluetooth earbuds, portable mini speakers, wireless earplugs for sleeping, hearing amplifiers, in-ear fitness trackers, compact Bluetooth speakers, mini FM radios, portable gaming devices
🏥 Health & Medical Devices
Digital infrared thermometers, wrist blood pressure monitors, body composition scales, pulse oximeters, portable ECG monitors, digital height meters, smart health watches, medical alert pendants, insulin pump controllers, portable nebulizers
🚴 Sports & Outdoor Electronics
Bike computers, cycling speed sensors, GPS running watches, outdoor adventure trackers, dive computers, golf GPS rangefinders, sports action cameras, waterproof flashlights, hiking GPS devices, ski goggles with display, smart cycling helmets
Why Choose ASOL Li-Po Batteries?
ASOL Battery is a professional lithium polymer battery manufacturer with years of experience supplying OEM and ODM partners worldwide. Our compact Li-Po soft pack batteries are engineered specifically for IoT devices, smart home electronics, and miniaturized tracking solutions — from Bluetooth item finders and smart door locks to health monitors and sports gadgets. The 501525 combines a compact square form factor with built-in protection circuitry and a wide operating temperature range, making it the preferred choice for product designers building reliable, space-efficient smart devices.
Every battery undergoes strict quality control and is UN38.3 certified for safe global air transport. We offer flexible customization including custom dimensions, connector types, wire lengths, protection circuits (PCM/PTC), and branding options to meet your specific product requirements. Reliable performance, consistent quality, and responsive technical support — that’s the ASOL promise.
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.
Contact Us
| Channel | Information |
|---|---|
| info@asol-battery.com | |
| +86 15779858703 | |
| 🌐 Website | www.asol-battery.com |
| ⏰ Response Time | 24 Hours on Working Days |
