Which Brand Of Battery Lasts The Longest?

There are different brands of batteries, but which one lasts longer? Duracell, Energizer, or Panasonic? This is a question that many people ask when they are looking for the right battery to purchase. All three of these brands have their own strengths and weaknesses. In this blog post, we will take a look at which brand of battery lasts the longest!


Duracell lasts longer than any other brand of batteries.


  • Different types of battery branded AA batteries such as Duracell, Energizer Panasonic.
  • Stopwatch or a smartphone to record time
  • Diary
  • Tape for labelling
  • 2x of the same flashlight that takes AA batteries


  • Ensure you label each of the flashlights
  • Put the AA batteries inside
  • Turn them on at the same time and start recording the time with a stopwatch.
  • Measure how long each flashlight takes before it runs out of battery.


The Duracell battery lasted the longest, followed by Energizer and then Panasonic. Alkaline batteries outperform their non-alkaline counterparts in general because they can provide more voltage for a longer period of time–but that does not mean you should discount other types altogether!


A battery is a dry cell that generates electricity by the chemical reaction it contains. The more chemicals can change into other ones, such as potassium hydroxide in alkaline batteries and ammonium chloride for non-alkaline ones, the better they fare with longevity. A battery produces energy through a chemical reaction between its electrolyte and electrode to generate power or electric current when needed – this depends on how many different kinds of chemicals are present (i.e., an alkali solution versus zinc). This explains why having stronger reactions means a longer lifespan: Alkalines contain basic solutions like potassium hydrogen oxide, which neutralizes acid forming salts, whereas zinks create amine compounds from ammonia gas without any water being added due to their design.

Do D or AA batteries last longer?

D batteries can indeed last longer depending on the use, but it should be irrelevant for most people. The higher energy efficiency of D-sized alkaline batteries means they can provide 40% more runtime than AA-sized alkaline batteries when used in flashlights and other heavy-duty devices. But for most people, the difference is unlikely to matter much since the vast majority of alkaline battery-powered household electronics use AA batteries whether or not this “efficiency advantage” applies. And as battery storage technology improves over time, there will be a corresponding decline in internal resistance, which diminishes power constantly requirements with newer generations.

How many hours does AA batteries last?

An AA alkaline battery used to power a flashlight usually lasts for 12 hours as it’s designed for intermittent use, typically open and shut quickly. An alkaline AA battery will last twice as long- about 24 hours- in devices turned on but not in constant use. A child’s toy or calculator activated by pressing a button for 20 seconds of every hour would work because it would turn off after each activation and rest between activations while the person waits to press the button again (hence “intermittent”). In this case, each push of the button would activate an electrical device for 20 seconds, then shut down for the rest of the hour.

Can AA batteries explode?

Yes. With the right amount of voltage, AA batteries will explode. For an AA battery to fail and then explode it must first undergo a process called thermal runaway. This is where the battery heats up and, in turn, raises its own temperature, which also causes it to heat up more; basically, causing a chain reaction until eventually there’s a fire within the device that generates more heat causing it to continue to grow hotter until there’s nothing left but smoke and flames. What can cause this occurrence? One example might be when someone leaves an electronic device powered by AA batteries for an excessive amount of time, such as at bedtime while they sleep or while out of town on a break from school with little supervision over their belongings.

What leaks out of AA batteries?

Electrolyte fluid. The sulfhydratestructuralcomplex is formed from three different ionic compounds: soluble acid, soluble salt, and water. The battery’s anode is the positive pole (+). In contrast, the cathode (-) can be found on the opposite side of the cell casing around which chemical energy is converted into electrical energy. Hence, batteries typically leak when they are short-circuited or overcharged. These leaks are created by excess hydrogen gas that seeps out and electrolytes spilling out of their glass barrier capsules where they should be contained within its confines and not venting in fear to the outside world.

We’ve conducted a battery test to see which batteries last the longest. In our tests, Duracell came out on top for AA batteries in most of our categories. If you have old ones lying around or are thinking about buying some new ones soon, make sure to pick up some from Amazon!

About the author, Phil Borges

Phil Borges is a battery aficionado. He's written extensively about batteries, and he loves nothing more than discussing the latest innovations in the industry. He has a deep understanding of how batteries work, and he's always on the lookout for new ways to improve their performance.