I recently bought a TalentCell external battery to power my Zoom F8. I have yet to use it on the field, and it is current still charging. Here is what my current set up looks like at the moment. My battery runs up to 6000 mah, and the voltage power stands at about 12.6 volts when fully charged. With this in mind it run up to 8 hours worth of battery life. However, I saw an image earlier for this other setup, I would like anyones insight as to what it is I'm missing, If I can get the battery to go a little longer that wound be great. Thanks for your insight!