Open the bottom of the bag with a seam ripper, and run the USB cable up into the chamber of the purse. Plug it into your phone or battery pack, and slide the induction coil behind the very outer layer of fabric/leather/etc. Tip the bag upright, align with your magnets, and play around with the position of the coil until the two line up and your phone is charging! Tape it in place inside the bag.

Close your bag back up along the seam with coordinating thread and a needle. A curved upholstery needle can come in handy for some types of bags.

That's it! Enjoy your new gadget-charging purse!