Tech Digest have reviewed the iPod version of the Exspect Recharge4 portable battery unit. 'The Recharge4 has dimensions of 84 x 41 x 23mm, roughly the same size as a ten pack of cigarettes, and weighs in at around 360g; it isn’t exactly going to be a problem to carry about. It only has one button, labelled C-Check/Start, which unsurprisingly starts up the charging and/or lets you know how much juice there is left. This is indicated by eight green lights on the front. You can probably tell it isn’t exactly a complicated tool.'