If you happen to own an mp3 player that recharges its batteries from the USB only (and most of them are built this way), you might be interested to find out that the small charger in the image above will solve the problem when you are away on a trip: you will not need to take your laptop with you – the charger in the image offers the needed power straight from the wall outlet. In comparison to a “normal” USB port, this gadget offers a more stable power source and thus the batteries of the mp3 player will be charged in a much shoter time. The estimated price is $14 and can be found in various shapes and designs on Amazon or eBay.