I found this great deal on eBay for a backup level 1 charger...I know the UMC can do this but there are times when I do t like leaving my UMC out... for the price I don't care if someone steals this ...check it out this guy has several more available
http://pages.ebay.com/link/?nav=item.view&alt=web&id=231539285454
http://pages.ebay.com/link/?nav=item.view&alt=web&id=231539285454