External batteries for the speedlite rules!

I shoot a lot of tabletop style images where I set up a single flash, an umbrella, ringlight or softbox and shoot a whole series of images.

These shoots often last most of a day because I need to shoot a bunch of almost identical images of products or other small items.

My flashes are SB 800's using AA batteries, and even though I use fairly good rechargeable cells, they do drain when the flash is turned on and used a whole day. In comes an external battery. I have two Godox PB-820 boxes with lots of power, and hooking one of them up to and SB 800 gives me almost endless power for a ton of shots. No drained batteries, no flashes going into standby, no flashes that aren't charged and ready.

Warmly recommended.