In this video i used two batteries and two load testers to do a capacity test. The nominal voltage is 18v, not sure where they came up with "20v". Also, they spolier alert: they both tested at about 2.3ah, which is about 92% of rated capacity. I supposed I could have used a click bait title and said "scam!!! watch out!! harbor freight is lying to you about the battery specs, but i suspect this is a industry standard. I am pleased with everything I have bought from them including these batteries, i just thought it might be fun to actually do this test and share it with the world