My Pack is using the Blue brick 12v 9800mAh battery with a SMAKN Dc/dc Converter 12v Step Down to 5v/3a Power Supply.
I only have a pack & gun light kit going at the moment. The average draw of these LEDs is probably ~20mA? With only a handful on at any moment I can't see these exceeding 200mA draw. The minimum for charging a smart phone is 500mA. So a 10 Ohm resistor to a USB port should achieve that.
is ~700mA too much draw for these blue brick batteries? There is so many conflicting specs on these things. Most i read is that I should not exceed 1amp.