Efest 21700 4000mAh 30A Flat Top Li-ion Rechargeable Battery
4000mAh and 30A discharge current, Efest 21700 Li-Ion battery
High current cell designed for power tools, garden tools and high current drain applications.
Best suited for industry, model making, battery carriers, torches, drones etc.
The cell has been encapsulated by Efest with a durable heat shrink tubing and provided with necessary ratings to ensure more safety in use.
| Capacity | 4000mAh |
| Minimum capacity | 3900mAh |
| Rated voltage | 3.6V - 3.7V |
| Charging end voltage | 4,2V ± 0,05 |
| Final discharge voltage | 2,5V |
| Max. discharge current (constant) | 30A |
| max. discharge current (pulse) | 45A |
| Protection electronics BMS | none |
| Positive pole | flat (Flat Top) |
| Diameter | 21.1 mm ± 0.15 mm |
| Height | 70.1 mm ± 0.2 mm |
| Weight | 69g ± 1 g |
| Charging method | CC-CV |
Safety instructions:
Lithium cells may only be operated with protective electronics!
Please note that lithium cells may only be used by authorised specialist personnel.
Incorrect handling or short-circuiting can lead to fire or explosion.
Further characteristics:
Lithium-ion batteries are thermally stable and are not subject to any memory effect.
They work on the basis of lithium and are characterised by a high energy density.
