3.7V 450mAh Li-poly Battery for Toys & Medical Devices
In ultra-compact electronic products, battery design is often limited by enclosure space, thermal stability, and charging safety.
This 3.7V 450mAh Li-poly battery was developed for toy and medical applications where size control, predictable charging behavior, and lightweight design are critical to product reliability and mass production.
Key features：
- Optimized cell chemistry to support stable 0.23A standard charging
- Defined safe upper charge limit (0.45A) to avoid swelling and overheating
- Tight thickness control (4.8 mm) ensured mechanical compatibility
- Lightweight structure maintained at 9 g, minimizing device load
- Verified 300 cycles with ≥80% capacity retention
| No. | Item | Parameter | Remark |
|---|---|---|---|
| 1 | Nominal Voltage | 3.7V | 3.7V/cell |
| 2 | Nominal Capacity | 450mah | @0.2C |
| 3 | Minimum Capacity | 6840mAh | / |
| 4 | Shipment Voltage | / | / |
| 5 | Initial Internal Impedance | ≤35mΩ | AC 1KHZ |
| 6 | Standard Charge Voltage | 4.2V | 4.2V/Cell |
| 7 | Standard Charge Current | 0.72A | |
| 8 | Max. Charge Current | 1.44A | |
| 9 | Standard Discharge Current | 1.44A | |
| 10 | Max. Discharge Current | 2.88A | / |
| 11 | Burst Discharge Current | 5.76A | ≤5s |
| 12 | Discharge Cut-off Voltage | 3V | 3V/Cell |
| 13 | Cycle Life | ≥300cycles | Retention: ≥80% |
| 14 | Charge Temperature | 10°C~45°C | Standard Charge |
| 15 | Discharge Temperature | 0°C ~80°C | Standard Discharge |
| 16 | Storage Temperature | -10°C~ 45°C | ≤3 months |
| 0°C~ +35°C | ≤1 year | ||
| 17 | Weight | About 9 | g |
| 18 | Special Request | / | / |
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3.7V 450mAh LiPo Battery Pack FAQs
Why is charging current control critical for small-capacity LiPo batteries?
Small-capacity LiPo cells are more sensitive to heat buildup.
Improper charging current may cause swelling, shortened cycle life, or unstable performance. CMB defines conservative charge limits and validates them during the design stage to ensure long-term safety.
Can the battery size be adjusted to fit a very tight enclosure?
Yes. Dimensional customization is a core part of CMB’s LiPo battery design process. Thickness, length, and tab orientation can be optimized based on the device’s internal structure.
How does CMB ensure consistent quality for volume production?
CMB controls cell matching, internal resistance range, and incoming material inspection. This helps reduce performance variation between batches, which is critical for mass-produced products.
Is this battery suitable for medical-related products?
The battery itself is designed following medical-grade safety considerations.
For regulated products, CMB supports documentation, traceability, and certification coordination at the system level.
What customization options are typically requested for this model?
Common requests include custom wire length, connector type, insulation materials, and protection circuit configuration.
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.
