Just went into the local 99p store and seen this hanging behind the counter. At first it just looks like an Energizer mobile phone charger but on closer inspection you get 2 Energizer Lithium batteries with it as well.
At best these batteries cost about £2 for 2 AA or AAA so this I thought was a wonderful deal. I have used these before in my digital camera and they last ages. I know you can get 10 cheaper batteries from the same shop but this will outlast all of those.
Oh yeah and you get the mobile phone charger as well. The ones they had were for motorola models but a quick tip for you is that the motorola chargers work on some Tom Tom's like my Go 720.