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Revealed: best and worst rechargeable batteries

Energizer, 7dayshop and Duracell batteries on test


Which? now has test results for 27 rechargeable batteries from brands including Energizer, Duracell, 7dayshop, Varta and Sanyo. But only eight batteries are good enough to recommend as Best Buys. 

We’ve tested high-capacity and pre-charged AAA and AA rechargeable batteries and have identified the best for charge retention, the longest lasting and the best value, so you can find rechargeable batteries to best suit your needs. Take a look latest results for AA rechargeable batteries and AAA rechargeable batteries

You can be confident your cordless phone or remote control will stay powered up for longer with our Best Buys rechargeable batteries. Our test scores include a rating for how long each battery stays charged when not in use, a rating for whether a battery achieves its stated capacity and a rating for how long each battery can keep going in high-drain devices. 

Whether you’ve been using rechargeables for years or are only just making the money-saving switch from disposables now, log in now to find out which are our Best Buys. If you’re not already a member, you can see the full test results and get access to all our expert reviews and advice by signing up for a £1 trial

Budget batteries on test

Several Which? members wrote in to tell us about their battery bargains from online battery store 7dayshop. We followed their advice and included four 7dayshop batteries in our latest tests, including AA and AAA high-capacity and pre-charged models. Our results uncover how long these batteries take to charge, how well they keep their charge when not in use and how long they’ll last in a digital camera or children’s toy.

Rechargeable batteries from 7dayshop are a budget option compared to big brand batteries from Energizer or Duracell. For example, Energizer Recharge Precision AA rechargeable batteries cost £10.49 for a four-pack while 7dayshop AA rechargeable batteries (2900mAh, HR6/MS1500) cost just £6.98 for a four-pack. Log in to find out whether they last long enough to offer real value. 

Save money with rechargeable batteries

Our testing has proved that choosing rechargeable batteries over disposables can save you hundreds of pounds. 

If you bought a four pack of our top Best Buy rechargeable AA batteries and charged them 100 times, they would cost you around £55 including the cost of our Best Buy smart battery charger and the cost of charging. For the disposable equivalent – 400 of our top AA Best Buy disposables – you would pay up to £749. 

Battery brands on test

We’ve tested a range of rechargeable batteries from the following brands:

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