Hello. I am really needing a battery back up. I think its to much spending $50 to $100 on a battery back up. I know Richard Solo and other company's make very nice battery packs for iphone. I looked on Ebay and i see unbranded Iphone battery backups for dirt cheap prices! I would like to know if these are really similar to the branded ones or just crap. Here are some examples: 1. http://cgi.ebay.com/External-Backup...ms=65:1|66:2|39:1|240:1309|301:1|293:1|294:50 2. http://cgi.ebay.com/New-External-Ba...ms=65:1|66:2|39:1|240:1309|301:1|293:1|294:50 3. http://cgi.ebay.com/Backup-Charger-...ms=65:1|66:2|39:1|240:1307|301:1|293:1|294:50 To look at other ones just search on ebay " iphone battery pack" I really need some suggestions on this guys. Thanks!