Portable Power Units, also referred to as Solar Generators or Power Stations, are a great way to have power on the the go. If you are not quite ready for a full-on battery/solar setup, this is a great way to go. This is an excellent way to have access power during emergency situations, camping outings, etc.
These all in one units provide AC power as well as DC power. In most cases, these power stations can be charged via solar and/or an AC plug in. Take a look and see which model meets your needs!