Originally Posted by
rjfoguy
What external battery(brand and specs) do you guys have to have for the iPad?
No brand specified.
Specs: (verbatim from F9)
Lithium back-up batteries must not exceed 300 watt-hours (Wh) as limited by DOT regulations for carriage in air travel. Most rechargeable lithium batteries marketed to consumers are well below 100Wh. To calculate the number of watt-hours a battery provides, divide the milliamp hour (mAh) by 1000 and multiply the amount of voltage (V)(e.g., 5400mAh/1000 x 11.1V = 60Wh).
Lots of guys use something like this:
Anker