[JackAZ]

Be cautious of using an inverter to charge Li-ion batteries. An inverter doesn't generate a true sine wave like an AC power source. Because the inverter is taking a DC input and simply multiplying it several times to generate the specified AC voltage it clips both the high and low ends of the AC sine wave. Li-ion batteries are sensitive to this and charging them from an inverter can shorten their life.

Having said that, it's a decision you have to make about how expensive the battery is, what it's anticipated life expectancy is, and how long you will own/use the equipment in question. Even being aware of the above I have yet to replace my inverter with a quality DC to DC converter for using any of my Li-ion power devices on the road.

After about two years, probably just shy of that, my Li-ion laptop battery holds only about a 20 minute charge. Had I not been using/charging it from an inverter it would most likely still be running at full tilt as if it were new. For me this isn't a horrible consequence since actual use away from a power source is rare and usually for a brief amount of time. I haven't encountered a situation yet where I've felt it's time to replace the battery. I just know that I have to be plugged into something if I'm going to be using it for more than a few minutes.