Ranking brands is different from ranking batteries, of course, and it turns out to be a lot more complicated. You cannot necessarily trust that every battery made by one brand is automatically better than every comparable battery from any other given brand.
Still, we must acknowledge the good ones, and some of the more highly regarded brands in the Lithium-ion rechargeable battery space include Samsung, Sanyo/Panasonic (who also make good 1.2v Li-ion rechargeables), LG, Sony, Shockli, Keeppower, LiitoKala, AWT, Tensai, Windyfire and Efan.
CinemaSound rated the cost per hour for Fuji's EnviroMax AA at the highest of all alkaline batteries they tested, edging out the Duracell Procell. Fujitsu is slightly more consistent in the sense that the battery brands we considered were almost all around the bottom of the pack, with the strange exception of the Fujitsu Universal Power AA.
Absorbent Glass Mat (AGM) batteries are the most advanced batteries you’ll find in a car right now, unless you’re driving a plug-in hybrid or a fully electric vehicle. AGM batteries are also suitable for cars with start-stop systems, but they offer the potential for many more starts than an EFB battery and will have a longer service life.
Trailcam Pro tested some batteries' performance in cold temperatures, and found that the Tenergy Premium AA rechargeable maintained 86 percent of its room temperature capacity even down at 5 degrees Fahrenheit. Next is German manufacturer Ansmann's batteries, which performed very well in independent testing.
As wonderful as eBay is as a resource for just about anything, it can also be a frustrating source of counterfeit and fake products. Let's look at the sad case of UltraFire, a Chinese battery brand that has become so closely associated with poor quality (and dangerous) fakes that it's impossible to recommend.