I’m new to the flashlight game, but I’ve developed a love for Emisar so far.
They’re pretty high quality for their price, and Hank is quite helpful with any questions and is active on this forum.
Although I’m trying a lot of different lights from ZebraLight, Sofirn and Fireflies currently.
I tend to lean towards a single brand, but I force myself to try something new every once in a while.

For batteries, I’ve had good experience with Samsung, Keepower and LiitoKala although they often have fraudulent floating around.