Explorer IPA76S not charging. Help!

hello. I bought the Ion Explorer ipa76s about 2 months ago. before the first use I charged it and it worked great. I am now trying to get it to charge and it wont. when I plug it in the lighting bold won't even show up that the box is even getting power. is it a bad battery already? or something else. I have only used this box about 15 times at 2 hrs at a time. please let me know what I need to do!
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