The power module is designed for the Raspberry Pi 3 Model B specially, allowing the master board to work offline for up to 9 hours. It's not only supplying for Raspberry Pi; this board has 2 USB type-A ports - one supplies power for the Raspberry Pi and the other for the embedded LCD screen. This product is 2 parts of the evaluation, namely: the maximum current evaluation, Pi3 with different types of liquid crystal after the actual life of the test. Maximum current evaluation, the use of high-precision EBC-10 electronic load on the product for testing. We put this product on the following six kinds of PI3 configuration for power supply. Considering battery individual differences, three rounds of endurance test. Respectively: PI3 single life, inch Pi3+2.2, inch Pi3+3.5, inch Pi3+5, Pi3+ off