Beside of very good and cheap Sim800l module , it is very hard to manage perfect power supply which it maintain the required voltage for th module.
Though it required up to 2 Amps at max burst , but it will work fine here , capacitor will add more power stability to the module
Battery will be also keep charging here, there is also cutoff circuit inside battery ,
you donot have the over charging issue for battery
It will maintain power for SSim module while any interruption in input
- Micro USB TP4056 Lithium Battery 18650 Charger Module 1A 3.7V
- GSM Module
- General Mobile set Battery
- 1000uf 6.3v Capacitor
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