The Wirecutter:

Rechargeable batteries are better and cheaper than you remember, holding a charge for years and costing less than a nickel per charge over their life cycle. In fact, after more than a dozen hours of research, a dozen hours of real-world tests, and over 70 hours of controlled testing with a pair of battery analyzers—including another 12 hours of real-world testing with flashlights and a camera flash—we found that the Energizer Recharge Power Plus are the best rechargeable AAs for most people most of the time. But we also found that almost all the brands we tested are good enough for most uses if you can find them at a discount.

And:

The Energizers handily beat the popular eneloops in both tests, offering about 16 percent more capacity and 7 percent longer flashlight burn time, despite having the same average price per battery.

Eneloops are one of the better sellers on Amazon, so this (to me) is a significant difference.