joining us now, terry sullivan electronics editor for consumers reports. brought three examples you reviewed. >> the duracell pad is for iphone products. so basically it works by coupling and basically it allows one circuit to go through a magnetic field to the phone and charge them up. the magnetic actually works into this. yot pull and get it just in the right area and a little sound. it's nice. under $80. $70. but it's only for iran phones. down side of this is you have to get cases for this. now there's an extra $50 for an iphone 5 and 4s. 26 bucks. a little bit more. like on my phone i have a big case on it already. so that's the one down side. >> the energizer, what about that? >> this one is for android devices and you can also have it for ios devices as well but the ios device can't work unless you have a screen for it. this can do two products at once. it also -- it will give you and indication but you have to get it just right to get it where the icon of where it's charging. >> but in any case this is $75 and it gives you a little light on top wh