You should be fine, and as long as they're authentic, no worries at that wattage. I'd read through/look through Bad's info if you have the time though. There is always something "new" to learn about batteries, and charging, and battery care, etc. You'd want to be sure you know why the batteries you got (and their ratings) are going to work for you at that wattage.
It's what I use (I'm even more puny on wattage, though) and I like them a great deal.
Anna