Developed for applications such as power tools, hammer drills, impact wrenches and all other applications with very high current consumption and moderate capacity.
Due to more and more applications, the 21700 battery size is becoming a very popular cell and is already successfully replacing the 18650 batteries in many areas.
This high current cell is usable with a constant load of 35A and even up to 45A with 80° temperature control . (Key figures from preliminary data sheet)
Current draw up to 70A pulse is realistic for the cell.
Technical data of the Samsung INR21700-40T
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 Samsung INR21700-40T – 4000mAh, lithium-ion battery
*Other options:
No selection: battery cell without options as in the main picture.
– Raised positive terminal: A button (nipple) welded to the positive terminal by means of a special welding process raises the flat positive terminal by approx. 2 mm, similar to a normal battery (for an additional charge).
– Solder tag: A metal tongue (W: 7mm x L: 25mm x D: 0.15mm), which is firmly connected to the battery at the plus and minus pole and is used to solder a connecting wire or further batteries to the component (at an extra charge).
U – Both solder tags point in one direction (e.g. for parallel connection or soldering to electronic components).
Z – Solder tags point in opposite direction (e.g. for series connection or soldering to electronic components).
Technical Data
| 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) | 45A with cut-off at 80 |
| max. discharge current (constant) (2) | 35A without cut-off |
| max. discharge current (pulse) | approx. 70A |
| Protection electronics BMS | none |
| Positive pole | flat (Flat Top) |
| Diameter | 21.15 mm ± 0.15 mm |
| Height | 70.15 mm ± 0.2 mm |
| Weight | 70g ± 1 g |
| Charging method | CC-CV |
| Preliminary data sheet | INR21700-40T |
| Charging current Normal | 0.xx – 2A |
| Max. charging current/charging time at 4A | up to 6A/1.5h |
| 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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