We review the 3DS XL Mugen Battery expansion and show how to fit it to a 3DS XL. Extends the battery by three-four times.
Live Battery test here soon: http://bit.ly/battery-test
Purchase battery for $100 here: http://www.mugen-power-batteries.com/nintendo/mugen-power-5800mah-extended-battery-for-nintendo-3dsll-with-battery-door.html