I have been gearing up my little in-home studio, and using multiple cameras means I have multiple monitors and lights going...so I needed some more power...but I wanted it to be mobile gear as adventure season approaches (winter where I live)...so settled mostly on NP-F batteries. I tried a couple off-brand ones to save money, but that didn't go well, so when I saw K&F had this 2 batteries w/charger kit for a good price, thought I'd give it a try...

- I used one in my largest screen field monitor, and one in a setup that utilizes an iPad as a cordless monitor. Both discharged at the same rate as my most expensive batteries, and worked particularly well with the iPad, even charging it all the way up while the screen and app were in use.
- charging time took longer than discharge on the iPad setup, but I am fairly certain that is due to the brick I used...a lower power one as I wanted to see how long it would take with a standard style, unknown spec (just in cases) charging brick.
- charger is lightweight, but has nice bright led indicators, though it does not display progress...only charging and fully charged...which is fine, but a progress meter would have been nice
- build quality is nice, pretty indistinguishable from the nice NP-F's I already had

Overall these seem to be great batteries at a very affordable price, and are an excellent addition to my budget friendly studio setup. Would happily get them again, and recommend.