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In this report

Batteries: Ratings of Sources

Total of 12 Sources
1. ConsumerReports.org
Not Dated
Batteries
by Editors of ConsumerReports.org
Our AssessmentConsumerReports.org's editors test 13 brands of alkaline batteries and two brands of lithium batteries, using both high-drain devices (cameras) and low-drain ones (flashlights). Lithium batteries consistently outperform alkalines, but they also cost a lot more. The editors recommend lithium batteries for high-drain devices and alkalines for low-drain ones. They also recommend rechargeable batteries for devices that see a lot of use, based on the results of an earlier test.
2. Choice magazine
Nov. 21, 2012
Rechargeable AA Battery Reviews
by Denis Gallagher
Our AssessmentChoice, an Australian equivalent of ConsumerReports.org, has the best test of rechargeable batteries we've seen. Editors put 15 NiMH batteries through 200 cycles of charging and discharging and then measure how much of their original charge they can still hold. They also test each battery to see how well it holds its charge in storage. Three batteries are recommended, but only one is available in the U.S.
3. Which? magazine
Not Dated
Batteries
by Editors of Which?
Our AssessmentWhich? magazine, the British equivalent of ConsumerReports.org, tests AA and AAA batteries to see how long they last under high-drain and low-drain conditions. Tested batteries include alkaline, lithium and rechargeable batteries from name brands such as Energizer and Duracell, as well as cheaper store brands. (Not all brands are available in the U.S.) For disposable batteries, the overall score factors in cost per hour of use; for rechargeable batteries, it factors in charging time and charge retention.
4. BitBox.co.uk
2012
BitBox's Battery Showdown
by Editors of BitBox.co.uk
Our AssessmentBitBox Ltd., a British electronics company, tests over 50 brands of disposable AA batteries. Using a specially constructed rig that drains the batteries at a steady rate, they test each battery under high and low current. Lithium batteries perform the best overall, but they cost more per ampere-hour than alkalines. Among alkaline batteries, well-known brands like Energizer and Duracell perform no better than store brands from Costco and Ikea.
Your Guide to Types of Household Batteries (AAA, AA, C, D, and 9V sizes)
by Michael Bluejay
Our AssessmentMichael Bluejay is an energy expert who has been interviewed in Newsweek and on NPR. His comprehensive guide to batteries recommends the best types for a wide variety of uses, from smoke detectors to cameras. Bluejay recommends low self-discharge (LSD) rechargeable batteries for most purposes. Based on his research, his favorite AA rechargeable battery is the Powerex Imedion, which combines high capacity, lots of charge cycles and a low self-discharge rate.
6. Amazon.com
June 3, 2011
Best Value if You're Looking for Higher-Capacity Pre-Charged AA Cells
by "NLee the Engineer"
Our Assessment"NLee the Engineer" is the handle of one of Amazon.com's top 10 reviewers, with over 600 reviews specializing in energy-saving products. In this detailed review, "NLee" compares the power capacity of several brands of LSD rechargeables -- right out of the box, after several recharging cycles and after a few months in storage. "NLee" finds that Powerex Imedion batteries offer the best value, but Sanyo Eneloop and Eneloop XX are also very good.
7. StefanV.com
Jan. 10, 2012
Review: Pre-Charged (Low Self-Discharge) Rechargeable Battery Comparison
by Stefan Vorkoetter
Our AssessmentElectronics enthusiast Stefan Vorkoetter tests 13 brands of LSD rechargeable batteries to see how well they hold their charge during storage. He measures each battery's power right out of the package, again after a full charge, one week after charging and seven weeks after charging. He finds that Sanyo Eneloop XX batteries deliver the most power at every stage, followed by the Energizer Recharge. He doesn't test the batteries' performance under actual use, however.
8. TomsGuide.com
March 22, 2010
Rechargeable Batteries Test
by Brian Nadel
Our AssessmentBrian Nadel, a writer for TomsGuide.com, tests four different rechargeable AA batteries, using them on a flashlight and a CD player and also measuring charging times. The Sanyo Eneloop Rechargeable comes out on top, beating batteries from Energizer, PowerGenix and Rayovac. Nadel says the inexpensive Eneloop is slower to charge than the Energizer, but it offers better long-term value. The other two competitors in the test are no longer available.
9. Engadget.com
May 12, 2010
AA Rechargeable Battery Shootout: Energizer, PowerGenix and Sanyo Eneloop
by Darren Murph
Our AssessmentDarren Murph, a tech reporter at Engadget.com, pits rechargeable batteries from Energizer, PowerGenix and Sanyo against each other in a head-to-head test. Each battery is tested in a Nikon SB-600 external camera flash, a Wiimote and a wireless keyboard. Murph finds that all three batteries perform more or less identically and are pretty close in price, but the Sanyo Eneloop has the edge in longevity. However, Murph says all three brands are worth their cost.
10. Amazon.com
As of May 2014
Batteries
by Contributors to Amazon.com
Our AssessmentYou can find just about any type and brand of batteries at Amazon.com. In fact, there are so many brands here, in so many sizes and quantities, that it's nearly impossible to compare them. Thus, rather than trying to figure out which batteries have the most and best reviews overall, we've relied on Amazon.com to find out what users have to say about the batteries that earn high ratings from our other sources.
11. DealNews.com
March 31, 2011
Test Results That Will Change the Way You Buy Batteries Forever
by Mitch Lipka
Our AssessmentA team of students at Worcester Polytechnic Institute tests a variety of AA batteries for DealNews.com. Testers measure each battery's initial voltage, use it for 19 straight hours and then check to see how much voltage remains. All the alkaline batteries, from Duracell and Energizer to cheap generics, perform pretty much the same. Energizer Advanced Lithium batteries retain much more power, but they're also pricier, and their high initial voltage could damage sensitive devices.
12. Wired
Jan. 23, 2012
Are Expensive Batteries Worth the Extra Cost?
by Rhett Allain
Our AssessmentRhett Allain of Wired tests two brand-name batteries, Duracell and Energizer, against a cheap dollar-store battery. He hooks each of the three up to a light bulb and runs it until it dies, measuring its current and voltage throughout. He finds that the two name-brand batteries perform almost identically, while the cheap one -- a heavy-duty zinc-chloride battery, rather than an alkaline -- loses power much faster.
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