The Powerboost 500 is one such safeguard. It's viable with the Arduino UNO, Due, Leonardo, Mega, and Duemilanove. Remember that this safeguard was explicitly planned in light of level Lithium Polymer battery packs. You can, notwithstanding, utilize any normal 3.7V or 4.2V Lithium-Ion or LiPo cell with a coordinated assurance circuit, like this one.

Instant Lithium Battery Charge Modules

By a long shot, the most well known choice for adding a Lithium battery in a…