Hello! I have a project with an Arduino Nano and Nrf24l01, for which I need your autonomy to be quite long, my project consumes around 150mah. Investigating I found out about the Lipo batteries, what happens is that the Arduino works with 5v and the batteries that are on the market are 3.7v, I also understand that they are somewhat dangerous. So, I would like to know if there is a cheap but safe voltage lifter, and a charging module to recharge the battery without having to remove it from its housing at a good price? or if someone knows another way to give the Arduino good autonomy it would be excellent!
If I manage to perfect the project I would like to do market tests to market it, that's why I need good security regarding its battery. Thank you.