Hyperkin is preparing a new 3DS battery extender for release very shortly that will allow you to enjoy the 3D effects on your 3DS for longer than the manufacturers 3-5 hour limit, promising to double the life of the 3DS battery.
The Hyperkin 3DS Powerplus battery expansion weighs approximately 2.2 ounces and will add and extra 1/4” to the thickness of your 3DS device, a small price to pay for double the juice, and extended gaming.
The Hyperkin 3DS Powerplus extra weight and thickness help with a little extra grip on the device says its manufacturer, and there is also a handy built-in LED indicator on the battery pack that allows you to manage your power consumption between outlets.