It's a bit frustrating when you're right in the middle of a round of Mario Chase and the Wii U Gamepad battery decides to go dead. But things may be looking up, as Nintendo recently introduced an upgraded internal battery for the Wii U Gamepad... In Japan.
The new battery apparently takes the place of the original in the back of the Gamepad, bumping the power up to 2,500 mAh from 1,500 mAh, and boosting battery life from 3-5 hours up to 5-8 hours of charge. Sadly, for the time being anyway, it looks like the upgraded battery is only available to Wii U owners in Japan. Nintendo wouldn't confirm or deny whether the new battery would be coming to the North America.
In addition to the Wii U battery boost, Nintendo Japan has also revealed a battery upgrade for the original Wii remote. The package includes the new battery, backplate and a charging stand. Again only available in Japan for the moment, the battery alone costs ¥2,625 ($26), while the whole package comes in at ¥4,200 ($41).
We'll be sure to let you know when/if any more information regarding these upgraded batteries is revealed.