Zoom BT-02 Rechargeable Battery For Zoom Q4 Boston Acoustic The H2n records to widely-available

The H2n records to widely-available SD and SDHC flash memory cards

Equipped with XT-60 connector on main power leads

And even then

ambient light situations

Zoom BT-02 Rechargeable Battery For Zoom Q4 Boston Acoustic The H2n records to widely-availableZoom BT 02 Overview The BT 02 1050 mAh Rechargeable Battery for Zoom Q4 from Zoom is estimated to power the camcorder while recording 720p30 video for up to three hours. It features a capacity of 1050 mAh, and delivers an average current of 3. 7V DC. When charging from the ZOOM AD 17 AC adapter it can fully charge in about two hours fifteen minutes, and from USB in about three hours.