At first, I am planning to use a 12V rechargeable battery as the power supply. However, the Peltier uses a 12V and 6A to power up. After some research, i found that the 12V 6A battery is too expensive and big. As a solution, I will choose the 12V 6A AC/DC adapter that I found online as an alternative because of the price and it is easy to use where just need to plug in.
Below are the order details of the adapter that I bought online :
