XYAB: Rechargeable Battery Pack - Nintendo 3DS/Wii U Pro Controller

High quality rechargeable battery pack for Nintendo 3DS® handheld systems and Wii U® Pro Controllers.
Screwdriver included for installation.

2000 mAh capacity, lithium Ion.

• Compatible with Nintendo 3DS® / Wii U® Pro Controller
• Input/output: 3.7 V