Hey fellas... I know there has been some discussions in the past on how to keep your phone charged on some of those all days hunts. I ran across this the other day while playing golf. Buddy had his phone and his boombox speaker hooked up to this thing and I asked what it was and he said it's a charger. There are 4 USB ports that you can have going at one time. Buddy said he has charged his phone at least 4 times and the charger itself was still at 3 of 4 lights so it still was at 75% charge which I thought was pretty impressive. $125 originally and Amazon has it for $33. I just got mine on friday and used it last night already. If you have been looking at finding something to help with all day sits, give it a look.