Black 4 in 1 Heat Sink Set Aluminum for Raspberry Pi 4 Model B

This 18650 Battery Holder/Development Board Compatible With Raspberry Pi3B/3B is a board that comes with a built-in battery charging module as well as an I2C battery monitoring system for the raspberry pi. If you want to convert your project into a portable solution then this is a solution for you this board comes with a 18650 Li-ion Battery holder and a charging module for the battery this board can supply a maximum of up to 6A current to the raspberry pi via its output terminals which is more than enough for the normal operation of the raspberry pi. This module has a built-in battery monitoring system, which can monitor the battery voltage and send the information via the I2C protocol to the raspberry pi. This can come in handy while building a self-powered raspberry pi project which can also monitor the battery voltage and alert when the battery voltage falls below a certain limit.