Please be cautious and check with your supplier if this product is for virus protection purposes and if the coronavirus (COVID-19) will affect your order.
1. Brand: Efest
2. Model: 21700 3700mah 30A
3. Nominal voltage: 3.7v
4. Discharging current: 35A
5. Capacity: 3700mah
6. Type: Limn
7. Length : 70mm8. Diameter: 20mm
9. Color: Purple
10. N.W: 75g
Cut-off Discharge Voltage
Charge Upper Limit Voltage
1.5 hours(with Efest battery charger)
Max Discharging Current
Continuous Discharging Current
cc/cv(max ,charging rate 2A)
charge (0 ~ 45°C)
discharge (-20 ~ 60°C)
within 1 month (-20~ 50°C)
within 3 months (-20~ 40°C)
within 3 months (-20~ 20°C)
Yes, we are. We are original manufacturer of Efest, based in Shenzhen, china. specialized in 3.7v high drain li-ion battery and charger over 8 years.
Yes, our factory is in Shenzhen, and we have branch in Hong Kong and USA.
No limited. But the more you take, the better price you will received.All products are always in stocks.
Usually about 3 days for air or express shipping orders, 7 days for boat shipping orders after payment confirmed.
T/T, Paypal and Western Union.
UPS, DHL, FEDEX and so on. We can also ship with your own shipping forwarder.
Gift packing for each products. Standard packing style for all shipping method. Also if you ship with your own agent, we can pack as your agent requested.
Yes, welcome to send us Trade Assurance Order anytime , also we can accept 30% deposit when preparing your order, just make sure full payment before shipping.
24-hour online service, please feel free to inquiry us!!!