We are using NODE MCU very often and NOD MCU required 5v to 10v power. some other Ardiuno circut like Ardiuno umo required around 12v battery we are providing affeliate links of some battery that you can buy from amazon
12v battery
5v battery
9v battery
This are some batteries that can you use in your projecct. all the batteries are rechargable , you can charge them when it will down .
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