First I'll say I have no experience with Earth-X specifically, but I do know a little something about the Lithium chemistry. They CANNOT simply be continuously charged like lead-acid batteries (this leads to a quick death, just like phones that people charge overnight, (and for reference, my phone is over 3 years old and still has full capacity) and can even be dangerous, remember the Dell and Apple laptops catching fire a few years back?), and their website only talks about discharge protection. I would hope that the discharge protection circuit also prevents overcharging, but again they don't say.