3.7V 820mAh IEC 62133 Certified Li-poly Battery Pack
Small electronics makers, like those who make medical wearables, smart toys, and Bluetooth-enabled items, often have a hard time finding a battery pack that works well and stays safe while still fitting the necessary size and safety standards. This case highlights how CM Batteries engineered a fully customized 3.7V 820mAh Li-poly battery pack with IEC 62133 certification, addressing critical challenges related to reliability, global compliance, and structural constraints.
Key features：
- Ultra-compact structure. With maximum dimensions of 5.4 × 25.8 × 65.5 mm, the battery was redesigned to perfectly fit the device’s internal space while maintaining the required 820mAh capacity.
- Fully IEC 62133 certified for global compliance. This battery pack completed IEC 62133 testing—covering electrical safety, mechanical integrity, abuse testing, and protection performance—allowing the customer to enter regulated markets without certification delays.
- Stable performance with optimized charge/discharge parameters. The battery pack supports 4.2V charge voltage, with charge currents up to 0.41A and maximum discharge current of 1A. Engineers validated temperature range from -10°C to 60°C, ensuring reliability in consumer and medical environments.
- Consistent, traceable production. Every batch undergoes capacity matching, internal resistance testing, and protection board verification. Result: 300 life cycles with ≥70% remaining capacity
| No. | Item | Parameter | Remark |
|---|---|---|---|
| 1 | Nominal Voltage | 3.7V | 3.7V/Cell |
| 2 | Nominal Capacity | 0.82Ah | @0.2C |
| 3 | Minimum Capacity | 0.80Ah | / |
| 4 | Shipment Voltage | / | / |
| 5 | Initial Internal Impedance | ≤200mΩ | AC 1KHZ |
| 6 | Standard Charge Voltage | 4.2V | 4.2V/Cell |
| 7 | Standard Charge Current | 0.164A | @0.2C |
| 8 | Max. Charge Current | 0.41A | |
| 9 | Standard Discharge Current | 0.164A | @0.2C |
| 10 | Max. Discharge Current | 1A | / |
| 11 | Burst Discharge Current | 1.5-4A | ≤10ms |
| 12 | Discharge Cut-off Voltage | 3V | 3V/Cell |
| 13 | Cycle Life | ≥300 cycles | Retention: ≥70% |
| 14 | Charge Temperature | 0°C~45°C | Standard Charge |
| 15 | Discharge Temperature | -10°C ~60°C | Standard Discharge |
| 16 | Storage Temperature | -10°C~ 45°C | ≤3 Months |
| 15°C ~ 35°C | ≤1 Year | ||
| 17 | Weight | About 0.013 | kg |
3.7V 820mAh LiPO Battery Pack FAQs
Can this battery be redesigned for different dimensions?
Yes. CM Batteries can adjust thickness, width, and length while maintaining similar capacity, depending on feasible energy density.
Does the battery include a protection circuit (PCM)?
A protection board can be integrated based on the device’s required charge/discharge parameters and safety needs.
Can CMB assist with the IEC 62133 certification process for other models?
Absolutely. We handle testing, documentation, lab coordination, and sample preparation for multiple global certifications.
What is the typical lead time for custom Li-poly battery development?
Prototyping usually takes 7–15 days, and mass production 3–5 weeks depending on complexity.
Can the battery be shipped internationally?
Yes. All packs comply with UN38.3 requirements for safe air and sea transportation.
Tailored Customization
Our design team can create custom battery designs for just about any device or machine.
Timely Delivery
Our efficient production and distribution process gets your product delivered in a timely manner.
Quality Guarantee
We stand by our products and guarantee you’ll be happy with your purchase.
