If I had to guess, I'd say you lost control of your own energy, and tried to push too much too fast...but I could be wrong.
Try meditating, calming and clearing your mind before charging items. Also avoid any music that isn't specifically calming to you.
Re: Charging objects!
By: Nekoshema / Novice Jun 23, 2015
Post # 3
you were charging it and you might of charged too much. one way many feel energy is a warmth [usually in your hands because thats where you're pooling the energy] you were doing it right, though i would stop if your hands got burning hot, not because anything would catch fire, but to try and decrease the energy a bit. my guess is at that point your wand was charged, so ground the extra energy in your body and call it a day. [unless you had other tools to charge]