The 702050 3.7V 700mAh lithium polymer battery is optimized for compact electronics like Bluetooth speakers, car recorders, and hand warmers. Its slim design (2.0mm thickness), stable voltage output, and 300+ charge cycles ensure reliable performance in low-power devices. EVE Battery’s LiPo chemistry enhances safety and energy density, making it a top choice for portable applications.
How Does the 702050 Lithium Polymer Battery Compare to Other Batteries?
Unlike cylindrical Li-ion cells, the 702050’s polymer design allows ultra-thin, flexible packaging, saving 20-30% space. Its 700mAh capacity outperforms similar-sized NiMH batteries by 40% while maintaining a steady 3.7V discharge. With a 0.5C charge rate and built-in PCM protection, it balances speed and safety better than generic LiPo alternatives.
When comparing energy density, the 702050 delivers 275 Wh/L compared to 200 Wh/L in standard NiMH batteries. This allows devices to operate 30% longer between charges. The polymer construction also enables custom shaping around internal components – a critical advantage in tightly packed devices like smartwatches. For thermal performance, tests show the 702050 maintains 95% capacity after 100 cycles at 45°C, whereas traditional Li-ion cells degrade to 85% under identical conditions.
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| Battery Type | Energy Density | Cycle Life | Max Discharge |
|---|---|---|---|
| 702050 LiPo | 275 Wh/L | 300 cycles | 1C (700mA) |
| NiMH AA | 140 Wh/L | 500 cycles | 2C (2000mA) |
What Safety Features Are Integrated Into This Battery?
EVE’s proprietary protection includes overcharge (4.25±0.05V cutoff), over-discharge (2.8V cutoff), short-circuit protection (＞15A current limit), and thermal runaway prevention through ceramic-coated separators. The aluminum laminate casing resists swelling better than standard pouch cells.
The multi-layer protection system operates through three redundant safety mechanisms: a current-sensitive PTC resistor, voltage-monitoring PCM, and mechanical pressure relief vents. During overcharge testing, the battery automatically disconnects at 4.28V within 150 milliseconds. For short-circuit scenarios, the built-in 15A fuse breaks the circuit faster than traditional thermal fuses (0.3s vs 2s response time). The separator can withstand temperatures up to 150°C without shrinkage, compared to 120°C in conventional polypropylene separators.
| Safety Feature | Activation Threshold | Response Time |
|---|---|---|
| Overcharge Protection | 4.25V ±0.05V | 150ms |
| Short-Circuit Protection | 15A Current | 300ms |
“The 702050 represents a shift toward application-specific LiPo designs. Its balance of energy density (275 Wh/L) and safety makes it indispensable for compact consumer electronics. We’re seeing 17% annual growth in this battery category, driven by miniaturization trends in hearables and medical patches.”
– Dr. Lin Wei, Senior Power Systems Engineer, EVE Energy
FAQs
- Can I use this battery to replace a 18650 cell?
- No. The 702050 provides 2.59Wh vs 10Wh+ in 18650s. It’s designed for low-power devices under 5W. Use only in compatible voltage systems.
- How long does it take to fully charge?
- At 0.5C (350mA), charging takes 2.5 hours from 2.8V to 4.2V. Avoid using 1A+ chargers – they reduce cell lifespan by 30%.
- Is shipping these batteries internationally restricted?
- Yes. UN38.3 certification is required for air transport. Ground shipping usually allows ≤4 cells without special documentation. Check local regulations.