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Remember that all electrical devices carry a risk of electric shock!
Misuse of batteries, batteries and chargers can cause injury and damage.
If you want to have an automatic cut-off feature, you should use one of the modules that have a relay on the circuit such as XH-M601, M602, M603, M604, XY-L10A, XY-L30A and so on. Thanks to the relay in the modules you see, the circuit is cut when the voltage reaches the desired level.
However, there is a very important situation that has been forgotten here and the details of which are given in many sources of information about the subject.
The voltage and current of the power supply to be connected to this module are very important in battery or battery charging.
You cannot adjust the input CURRENT and VOLTAGE on the charging modules with relays on this type. For this reason, if you plan to charge the battery with how many volts and amps, you should find a power source with that voltage and current; Since this is very difficult, you need to connect a voltage regulator in front of them.
These regulators are divided into two as step-down and booster.
If the voltage of your power supply is higher than the battery charging voltage, step down voltage reducer cards such as LM2596-XL4005-XL4015-XL4016,
If the voltage of your power supply is low for battery charging, then you need to connect a boost module such as XL-6009, LTC 1871 in front of them.
If you do not do this, your battery will not be charged properly. You can even damage it.
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