Both batteries charged up and work great.
The Lumix FZ300 camera recognized the battery normally and showed it with a full charge after inserting.
Exceptional value...I got the 2-pack which comes with the car charger - probably worth $150 if I went for the Panasonic original version.It's interesting they manned squeeze in 30% in the same case as the Panasonic original.Came in a great package that can also be your travel case for these batteries and chargers.The batteries charged fine with the included charger and worked fine on my camera.This is the first day experience.Will update in a month as to how they performed in the field.
Great deal and works perfectly with my Lumix FZ300.
1 battery wouldn't charge upon arrival, seller replaced it immediately for no additional cost.
Charger burned out and stopped working in less than 1 month (you can smell the burned out transistors and circuitry emanating from it).
Likely from shoddy electronics.