Equipped with Battery Management System (BMS), the 21700 Lithium Ion battery from XTAR is versatile. The integrated protection electronics protect the battery against overvoltage, undervoltage and short-circuit as well as reverse polarity. The built-in industrial cell was developed by Samsung for the fields of industry, mobile energy, electromobility, LEDs, etc. With integrated protection electronics especially suitable for torches and laser pointers.
Please note the dimensions of the cell before buying! Due to the built-in electronics, the cell is not suitable for every application!
Height and diameter are larger than a standard 21700 cell without PCB.
Lithium cells may only be operated with protective electronics!
Please note that lithium cells may only be used by qualified persons.
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.
Technical Data
| Capacity | 5000mAh |
| Minimum capacity | 4753mAh |
| Rated voltage | 3.6V – 3.7V |
| Charging end voltage | 4.20V ± 0.05V |
| max. discharge current | 10A |
| max. discharge current PCB | 10A |
| Charging current | 0.xx – 2A (2000mA) |
| Discharge voltage | 2,50V |
| Protection | present PCB |
| Positive terminal | raised (button top) |
| Diameter | 21.5 mm ± 0.30 mm |
| Height | 74.70 mm ± 0.40 mm |
| Weight | 71 g ± 0.01 g |
| Charging method | CC-CV |
| Certificates | 21700-5000.PDF |
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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