I've been considering use of a APC brand UPS (700) as a means of charging phantom batteries when away from home. Thoughts were that I could be charging a battery while still flying out and about. Connect the AC chanrger to the battery backup side and let it go. I do have an invertor for car charging but do not want to leave my car idling unattended and for an hour and a half. If the APC can handle the power needs it might work. Has anyone else tried this?