Natasha McDermott gets tired of putting new batteries in her kids' toys.
Natasha explains, "They're expensive! And I have to run out and buy batteries, and it's a complete hassle!"
Double-A batteries are the most widely sold. Consumer Reports tested a dozen, including ones from Rayovac, Energizer, and Duracell, as well as store brands.
Sarah Goralski with Consumer Reports explains, "We looked at different types of batteries - lithium, nickel oxyhydroxide, and alkaline."
To measure how long batteries last, testers load them into identical digital cameras. They zoom three times … take five photos with the flash … zoom three more times … then take five photos without the flash.
After a 10-minute rest, the test is repeated again and again until the batteries die.
Walgreens Alkaline Supercell - the lowest-rated battery - took only 133 photos.
Compare that to the Energizer Advanced Lithium - the top-rated battery - which took 809 photos! But this four-pack costs almost $11.
Sarah goes on to say, "Lithium batteries cost more, but they last longer, so you save in the long run."
But you have to be careful which lithium batteries you buy. While that top-rated Energizer Advanced Lithium took 809 photos, the Energizer Ultimate Lithium took just 470.
Lithiums are best for digital cameras, which use a lot of energy.
For remote controls and devices that use less power, go with alkalines. The Duracell Ultra Advanced are the top-rated alkalines and cost around seven dollars for a four-pack.
And for toys, opt for rechargeable batteries. They'll save you the most.
Consumer Reports says most alkaline batteries can be thrown out in the trash, but rechargeables should be recycled. They contain toxins that shouldn't go into the landfill.