Automatic battery switching

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Hi. I'm fairly new To electronics but am working on a solar powered battery pack fou chafing cell phones and similar USB 5v devices. My setup is using off the shelf solar panels, a lipoly battery and charger and a minty boost. The batteries I am using are rated at 6Ah. I want to increase the stored power available so originally assumed I could wire two batteries in parallel. I have since found out that lipoly batteries need to be balanced sets and my plan won't work. Any suggestions would be greatly appreciated.
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You can usually parallel LiPo batteries. You have to make sure that they are charged to the same voltage before you connect them.