I've bought several lights and batteries and they work very well. I've found it best to have one battery per light. I run two lights on one battery which cuts down on space, then is an easy switch after about 7 hours to finish the day.
This is a nice little battery
My original power center has worked well. Run times have been a bit under 8 hours powering two lights. I'm using this power center for my cell phone and ipad and as back-up for the one that came with my light kit.
Does the job
I purchased this battery to have as a spare for my light kit. It a little pricey, but the quality is there and it works well. Both my batteries are getting around 7.5 hours running 2 lights. The USB charging port is a nice feature....charges my iphone without breaking a sweat.
Charges quickly, very handy for our tradeshow booths.