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Buy the best batteries and save money

Tough Which? tests reveal five Best Buy batteries


On test: 22 disposable batteries, including Duracell, Energizer, Varta and supermarket brands

Do Duracell and Energizer batteries outlast the rest? Our new tougher disposable batteries test revealed five Best Buys, plus how you can save money on batteries.

We tested 22 AA and AAA batteries from big brands and supermarket own-brands, and found that the priciest aren’t always the longest-lasting.

The cheapest battery on test costs one seventh of the price of the most expensive (per battery). Our tests also found a great value alternative that’s half the price of the most expensive Best Buy battery.

To find out which batteries are Best Buys, head straight to the best AA disposable batteries and best AAA disposable batteries.

Best cheap disposable batteries

You don’t need to spend a small fortune to get the best batteries. Our pricing research discovered that there are some great deals out there, provided you know where to look.

We tracked the pricing of branded batteries for a year from September 2014 to September 2015, using price comparison website Mysupermarket. After applying our pricing analysis, we found one branded battery that was on offer at one of the major supermarkets every day of the year. 

Find out which battery we’re talking about in our full batteries reviews.

Tougher new batteries tests

This year’s disposable battery tests simulate three different types of devices you use batteries in, after we asked Which? members to tell us about how they use their disposable batteries. So our results tell you which batteries are best for high-drain devices (such as remote controlled toys), medium-drain (a games console handset, or low-drain items (such as clocks).  

We’ve also added a leakage test, after 28% of Which? members told us that they have experienced disposable batteries leaking in the last two years (online survey of 1,292 people, August 2015). More than one brand of battery leaked during our tests.

Find out more about how we test batteries, including disposable and rechargeable batteries.

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