So you have the Nintendo 3DS and still there is that age old problem of battery power, a 3D game will eat up a fully charged battery pack in around three hours, after that you are doing nothing but looking at the window. Unless you happened to have a CTA Digital Nintendo 3DS Deluxe Power Grip, it has grip and stand features, but most of all it can double the battery life and that is what makes all of the difference to a gamer.
These are the features and details for the Nintendo 3DS Deluxe Power Grip;
Built-in Rechargeable Lithium-ion 3.7V 2600mAh Battery Pack
Play your 3DS 2x longer than with the 3DS’s internal battery alone
Charge with the included USB cable or your original 3DS AC adapter
Integrated Stand with 1 3DS game slot.
Light-weight and comfortable design.
Priced at $30 in the US, it does not seem to be available in the UK!
Source [Geeky Gadgets]