I have 25 years of experience developing communications products for low power, cost effective IOT solutions. Founded and built a diverse team in a successful start-up, as well as heading a world-wide team to develop a complete modem solution facing challenging competition. Having created a number of Raspberry Pi projects, I have now designed a Raspberry Pi battery power solution called the Red Reactor, which you can find on the web. I hope it helps to make your projects a success!