In my experience with flashlight batteries I find that both the Rayovac and Energizer brands of batteries last the longest in flashlights and other devices.
The Rayovac brand lasted longer in my flashlights than the Energizer brand batteries so I would recommend if you're wanting a good long lasting flashlight battery to go for the Rayovac brand batteries.
If you can't find the Rayovac batteries where you are then you can either look online to buy the batteries or use the Energizer brand if those are available where you are.
I buy my batteries online and get a better deal on them than in the stores and I also save money on sales tax doing so as well.