Won't it be difficult to use if there's no outlet around?It only has about 3 hours' worth.Each...So what are you going to do?They...they don't fit...I have an external battery that I've been using 'til now, so I'll connect that and use it.It HappensBut the problem with this is that it has a low battery capacity.I'll use this XP18000.The DC plug that the EP-121 uses.The size-adapter plug that came with the battery.The minimum diameter that a 19V power supply uses....has its own specs!!