In India, we are the first to manufacture a premium variety of power bank mainboards. The phenomenal growth of the global IT industry ensures that India does not miss out on the race. The boom in smartphone and tablet sales has also resulted in a major increase in the power bank market. The capabilities of digital products are rapidly expanding, resulting in the widespread use of smartphones in a variety of applications. As a result, the battery backup time decreases. Building a Power Bank for Mobile Phone as a backup charging source for emergencies that is also portable will be a lot of fun. We used a charging circuit to charge the power bank’s battery and another circuit on the same board to charge the mobile phone in this setup. The motherboard has built-in security. Overcharge protection, over-discharge protection, and overcurrent protection are all included in the charging process. To protect mobile phones from being overcharged, the intelligent output device will immediately cease charging once the battery is fully charged. User devices will not be harmed by the steady output voltage and current. When you first connect the board, connect the battery, then the micro USB charger, and charge the battery to full capacity before using. It is necessary to prime the IC in order for it to start and shut down correctly.