Designed for power tools, garden tools and high current draw applications.
This high current cell is equipped with a load of max. 30A constant and pulse load up to 55A.
Efest IMR 21700 3700mAh 30A discharge current constant lithium-ion battery.
The cell has been encased by Efest with a durable heat shrink tubing to ensure more safety in use.
Best suitable for industry, model making, battery carrier etc.
Due to more and more applications, the 21700 battery size is becoming a very popular cell and, as intended, is already replacing the 18650 batteries in many areas.
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.
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.
1x Efest IMR21700 battery – 3700mAh, lithium-ion battery
Technical Data
| Capacity | 3700mAh |
| Minimum capacity | 3630mAh |
| 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) | 55A |
| Protection electronics BMS | none |
| Positive pole | flat (Flat Top) |
| Diameter | 21.35 mm ± 0.15 mm |
| Height | 70.3 mm ± 0.2 mm |
| Weight | 70g ± 1 g |
| Charging method | CC-CV |
| Charging current normal/charging time | 0.xx – 2A |
| max. charging current/charging time at 4A | up to 4A/2.5h |
| Operating temperature Charging | 0 °C – 45 °C |
| Operating temperature discharging | -20 °C – 60 °C |
Notes:
A special charger is required for charging lithium-ion batteries, which charges the batteries according to a special charging procedure. (CCCV = constant current, constant voltage.) The batteries must not be charged above a voltage of 4.2 volts, otherwise there is a risk of fire and explosion. It is advantageous to charge the batteries only up to approx. 4.1 volts, as this significantly increases the service life or the number of charging cycles (possibly up to double). Only lithium ion chargers may be used for charging. However, the cheap chargers sometimes have the disadvantage that they do not switch off safely at the end of the charging process, but continue to charge the batteries with a small charging current, which can be dangerous.
Furthermore, rechargeable batteries and batteries do not belong in household waste! Please dispose of them as prescribed by law at the municipal collection points or in the [usually green] containers provided by retailers.
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