Of course, with any battery, and Nyko's
Power Pak + is no exception, the question is how long will it last. With my old battery, I could get anywhere from three hours to five hours of life depending on the various settings I would play with. Mind you, Nyko claims the
Power Pak + will double your battery life. While I never got to a full 10 hours out of the new battery, I did find it would last easily into the seven to eight hour range.
I tried being as consistent as possible with my testing. I would stick to one game, Super Monkey Ball 3D, and see how long both batteries would last without the 3D turned on and the wireless turned off, and then again with all the bells and whistles of the 3DS turned up. I got a variety of results, and while I couldn't simply leave the games up and running constantly during my testing periods, I tried to minimize the hibernation time in all cases in order to be as accurate as possible.
I found pretty much what I had expected. While neither battery performed any better, relatively speaking, than the other in the various setups, the Nyko replacement battery lasted longer. In other words, besides the extra cells in the Power Pak + that allow it to simply go further between charges, the amount of time between each battery's death with everything turned up and with everything turned down were basically the same.
In the end though, I found it very satisfying that the new battery, with everything turned on, could consistently get to the old battery's life with everything in "power save" mode. So if nothing else, the Power Pak + lets you enjoy the full gaming experience as long as the old battery let you go with only the minimal of power usage possible.