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This site does not include all credit card companies or all available credit card offers. Please view our advertiser disclosure page for more information. The current probably shouldn't jump up like that. I guess it could have been a loose connection or something. Either way, the Duracell and the Energizer batteries seem to have similar curves, but the DG is significantly lower.
Now, I can multiply the current and potential to get the power. Here is that plot for all three batteries. I can already see that I was wrong. Clearly, these cheaper batteries are not nearly as good as the more expensive ones. Ok, but what about the total energy? If I integrate these three curves, I get the following stored energies:.
It seems that maybe the Duracell and Energizer are essentially the same. Yes, the Energizer has a higher stored energy, but it also has that small jump in the current that may or may not be real. Other than that current hiccup, the curves for those two batteries look quite similar. Yes, the better batteries have more energy. But how much do they cost? First, for the DG batteries.
That is 20 cents per battery. You can't beat that with a stick. What about the energy per dollar? Really, you are paying for energy - right? Let me call this the money-energy density. I will use the symbol u to represent this. So, for DG:. What about the Energizer batteries? Well, since I am cheap I only purchased two of these. Really, to be fair I should look at the price of a twenty-pack. Here is a pack from Walmart. Oh, and yes - I know you could get a better deal on batteries at Amazon , but I am trying to compare going to the store to buy batteries.
This would give an money-energy density of:. And now for the Duracell batteries. The money-energy density would be:. The technology for these pre-dates alkaline batteries; they contain less energy and have a shorter shelf-life. The best AA batteries will keep your most power-hungry devices running for more than three hours longer than the worst. When it comes to low-drain devices, the worst AAs on test conked out at around an astonishing 20 hours before the best.
We're tested the battery life in hours and minutes across a range of devices. Our tough tests have found that there is no direct link between price and quality — so paying more doesn't guarantee your batteries will last. Now find the perfect batteries for you by checking our batteries reviews. Test score. Looking for the batteries that will last the longest? Hollie Hennessy.
How much do I need to spend on batteries? Related articles How we test rechargeable batteries How to fix common LED problems How we test dishwasher detergents How eco-friendly is your washing-up liquid? Share on Facebook Share on Twitter Share by email. Duracell Standard rechargeable batteries, or Duracell Recharge Plus, are best used in everyday devices, offering great value for money. Duracell High Capacity rechargeable batteries are much better used in high drain products like digital cameras, wireless mice or game controllers.
These are known as Recharge Ultra. Some of these higher capacity batteries also come with Duralock technology. Ready to use straight from the box, you can keep your devices powered even when on the move. Your Guide to Duracell Batteries. Alkaline batteries Duracell alkaline batteries are ideal for a huge range of uses, often chosen for household devices like wireless mouse, toys and remote controls.
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