SB Electronics: 12V Battery:
Choose a rechargeable 12V battery, such as a sealed lead-acid (SLA) or lithium polymer battery.
Charging Module:
Select a 12V charging module with overcharge protection.
Voltage Regulator (if needed):
If your WiFi device operates at a lower voltage, use a voltage regulator to step down the voltage
SB Electronics: Microcontroller:
Use a microcontroller (e. g. , Arduino) for battery monitoring and control.
Voltage Divider:
Implement a voltage divider to measure the battery voltage and determine the battery level.
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