Originally posted by demp10 I use the quantum 2 pack with both of my AF400T. It works great, can power both flashes at the same time and recycles fast. It is a fairly heavy external pack that uses a SLA battery and can be attached to the flash with a cord that you screw at the bottom of the handle instead of the 6-battery holder. You can clip the pack on your belt or use a shoulder strap. I have also the HV pack but it next to impossible to find 510V batteries so I never use it.
Ditto. When I need to take a ton of flashes, I use pretty much the same setup.