Zoom BCQ-2n, Battery Pack, For Zoom Q2n and Q2n-4K, Allows up to 4 times the recording time, Requires 4x AA batteries or Ni-MH batteries, Connect to the recorder via short USB cable (included), Dimensions: 51.5 x 64.5 x 47.8 mm, Weight: 67 g@+*A note on disposal: *Check your local laws and regulations for the