303040 3.7V 300mAh Li Polymer Battery CE Certified For Smart Watch
Price:
$0.98-1.25
MOQ:
10
Delivery Time:
7 work days
Brand:
VATS Battery or Neutral
Product Description
303040 3.7V 300mAh Li Polymer Battery CE Certified For Smart Watch
Technical Specifications
| Item | Details |
|---|---|
| Model | HZ303040 |
| Cell Type | Lithium polymer battery |
| Dimension | 3.0±0.2 × 30±0.5 × 40±2.5mm (Thickness × Width × Length) |
| Nominal Capacity | 300mAh (Custom capacity/size/voltage available) |
| Nominal Voltage | 3.7V |
| Max Cutoff Voltage | 4.35V |
| Standard Discharge Current | 0.2C–0.5C |
| Max Discharge Current | 1C |
| Connector | JST / Molex, customizable |
| Cycle Life | 500 cycles |
| Certification | CE Certified |
Key Features
- Compact Form Factor: Thin 303040 footprint saves internal device space while maintaining stable power supply
- Reliable 500-Cycle Service Life: Consistent performance over repeated charge cycles for longer usable time
- Customizable Connectors & Capacity: Choose JST or Molex connectors, or request tailored sizes to match your hardware design
- CE Certified & Shipment Compliant: Passes CE safety tests and meets international air & ocean shipping standards
- Manufacturer Direct Supply: No middle markup with sample support available for verification before mass production
Applications
Frequently Asked Questions
Can I get samples of this li polymer battery for testing?
Yes, sample testing is supported to validate the 3.7V wearable device battery with your circuit design.
What is the standard lead time for bulk orders?
2–3 weeks for custom orders; 3–7 days for in-stock items.
Can I change capacity, dimension or connector?
Custom size, capacity and voltage are available, including JST/Molex connector selection.
What cycle life can I expect from this lithium ion battery cell?
Rated for 500 charge-discharge cycles under standard discharge conditions.
Is this battery CE certified for export?
Yes, it carries CE certification, and packaging meets international air & sea transport rules.
What is the max continuous discharge rate?
Maximum discharge current reaches 1C; standard working discharge range is 0.2C–0.5C.
What is the maximum cutoff charging voltage?
4.35V, please use matched charge management board to avoid overcharging.
After-sales Guarantee
We provide manufacturer-backed support for this li polymer battery. All units go through pre-shipment inspection and hold CE certification. If quality issues occur under normal use, we coordinate replacements or solutions quickly. Our technical team supports your hardware integration questions. We follow international shipping standards for safe global delivery of this lithium ion battery cell.
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
Shenzhen Vats Power Source Limited
Location
1A 702, Huaqiang Creative Industrial Park, Biyan Street, Guangming District, Shenzhen, Guangdong Province,China
Contact Person
Lynn