Best Batteries: Efficiently Power Up Your Devices
The best batteries for all of your various power needs.
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BY Heather Fishel / LAST UPDATED ON July 26, 2021
Batteries are a must-have in any household. Whether you keep a supply of different batteries in your toolbox or store a stash in your garage, batteries are something you always need — and something you’re always running out of. So many different items rely on batteries to function, from fun toys to functional flashlights to tools, electronic gadgets, and more. Even your car key fob relies on a battery to work properly.
When these batteries die, you need to be ready with replacements ASAP, which is why it’s a good idea to have a selection of batteries in different sizes at your disposal. Batteries come in many different shapes, sizes, and formats, but there’s one that you always want to make sure of: that you’ve bought quality batteries that’ll last. With durability, value, and longevity in mind, take a look at our picks for the best batteries below.
A highly useful, very versatile AA battery that’ll power your essentials and offer great durability.
- Long-lasting performance in all kinds of items
- Great for household essentials
- Guaranteed against defects
- Some batches may be less durable than others
Affordably priced compact cell batteries made with high-quality materials.
- Great for small items that need more specialized batteries
- Good voltage
- Quality can be inconsistent from batch to batch
A wealth of the most commonly used batteries with great power and longevity.
- Leak-resistant design and materials
- Long-lasting in all kinds of devices
- A great choice for items used daily
- Only two battery sizes included
Why Trust Us
Our reviews are driven by a combination of hands-on testing, expert input, “wisdom of the crowd” assessments from actual buyers, and our own expertise. We always aim to offer genuine, accurate guides to help you find the best picks.
Benefits of Batteries
- Quick, easy power. Quality batteries allow you to power up devices in no time at all — and with little effort. You can simply swap out old, depleted batteries for new ones, restoring a full “charge” to any battery-powered item in just seconds. Many products even use the same size batteries, like AA or AAA, which makes batteries even simpler.
- Versatility. With a stockpile of common batteries in various sizes, you’ll have excellent versatility. A single battery type or size, like a coin or cell battery, can be used in a wide selection of different products. Many products rely on the same batteries, which means you’ll easily be able to adapt.
- Simplicity. Batteries are undeniably simple and straightforward. They’re so easy to use that you can literally “plug and play”, inserting them to get immediate power. All you need is the right size for the item in need of power, and you can put it to use within just seconds.
Types of Batteries
Primary Cell Batteries
Primary cell batteries are the most common kind of battery you’ll come across. Also called non-rechargeable batteries, these batteries are galvanic cells that are designed to be used once, then discarded when the power is depleted. These single-use batteries come in many different sizes, including the common AA, AAA, C, and D sizes, and are made from different materials. They can power a wide array of different gadgets, toys, tools, and more.
Secondary Cell Batteries
Secondary cell batteries are an alternative to primary cell batteries. They’re essentially the complete opposite: a secondary cell battery is rechargeable. These batteries can be discharged, or use up all of their available power, and they can then be recharged back to full power. Secondary cell batteries are more economical, as they can be recharged and reused many, many times. Like primary cell batteries, they come in many different sizes and are a great choice for items that use up batteries quickly.
Specific Application Batteries
Specific application batteries, which go by several different specialized names, are batteries that have one specific use. These batteries include automotive batteries, wet cell batteries, Zamboni batteries, and biobatteries. They’re less commonly used and come in many different sizes, capacities, and designs. Each specific application battery is designed solely for certain tasks.
Duracell is one of the best-known and most respected names in batteries. Since its founding in 1924, this brand has been a go-to for anyone who needs common batteries, with products like Duracell CopperTop AA Alkaline Batteries and Duracell CopperTop AAA Alkaline Batteries stepping in to deliver lasting power and great performance.
With a history of innovation and ever-improving products, Energizer is another one of the best-known names in batteries. Founded with a single dry cell battery in 1896 that was just for consumers, Energizer rapidly became a household name. Now, products like the Energizer Max AA & AAA Batteries Combo Pack and the Energizer Rechargeable AA and AAA Batteries with Charger are standouts.
Originally founded in 1906 under the name the French Battery Company, Rayovac has a long history in batteries alone. In the years since, the brand has changed and merged with others. However, the Rayovac name and its storied products, like Rayovac Alkaline D Cell Batteries, are still favorites among those looking for household or everyday batteries.
- Under $10: Many batteries — especially those in smaller sizes or packs — will cost you less than $10 per purchase. Lesser-known brands and very common battery sizes, like AA and AAA batteries, tend to fall into this price range.
- $10 to $30: If you’d like to buy your batteries in bulk or want to opt for bigger, better name brands, new batteries will likely cost between $10 and $30. You can also find mixed packs that include different battery types and sizes, as well as rechargeable batteries, within this range.
High Energy Density
Batteries that have a high energy density can offer more potential energy and be more powerful. Energy density is the potential energy inside a battery compared to the weight of the battery. Small batteries with high energy density will pack a punch, performing with high energy and potential. Low energy density means batteries are physically bigger and heavier, and they have less available power in total. Higher energy density can result in better overall performance.
Many Applications and Uses
The more versatile a battery is, the more uses it offers. If you choose a battery that can be used in many different applications, you’ll get more value and capability. Some batteries are more widely used — like AA and AAA batteries — while others have more limited applications and use. Stocking up on the types of batteries that have the highest number of applications will ensure you likely always have just what you need.
High Power Density
Like energy density, power density is an important metric for a battery’s performance. A battery’s power density is essentially its current availability — so a higher power density means the battery can sustain high current draws for larger, longer periods. Essentially, higher power density is another factor that can make a battery perform better with just the right amount of power.
- Rechargeable Batteries Offer More Bang for Your Buck. One of the biggest frustrations of using batteries is how many you’ll go through as they quickly become depleted. Instead of buying brand-new batteries every time you’re in need, consider opting for rechargeable batteries. It’ll save you money in the long run, provide better value per use, and can lessen your overall impact on the environment as you keep a single battery for longer.
- Value Packs or Bundles Are Great Buys. Wondering whether you should buy small packs of batteries or spend more to get more batteries? It’s usually a better idea to opt for more, as batteries are typically cheaper when there’s more to a pack. Buying in bulk — even smaller bulk packages — can help you spend less and save more, and you’ll ensure you always have batteries on hand.
- Variety is Best for Your Toolbox. To be prepared and have all of your potential battery needs covered, it’s a good idea to have a supply of many different kinds. You can start by buying a variety of the most common kinds of batteries; think AAA, AA, C, D, and coin or cell batteries. If you use flashlights or other tools that rely on more specialized batteries, consider stocking up on those too.
Best Batteries Reviews & Recommendations 2021
- Battery memory can affect a battery’s performance over time, especially if you’re using rechargeable batteries. Make sure you fully deplete the batteries before recharging, or performance can worsen.
- Simple details like the temperature and the humidity level can all affect a battery’s performance and longevity. Make sure you’re storing your batteries somewhere dry and at a mild temperature where they won’t be exposed to damaging factors.
- Even rechargeable batteries can completely lose their power and become permanently depleted. After so many charges, you’ll have to recycle your rechargeable batteries and buy new ones.
Q: What is a good battery brand?
Some of the best battery brands are those that you already know quite well — like Energizer, Duracell, and Rayovac.
Q: What are the best batteries?
We like the Duracell CopperTop AA Alkaline Batteries, which are both a very commonly used battery size and a choice that’ll offer good performance paired with reliability.
Q: What are the best batteries for beginners?
If you’re picking out the first pack of batteries to begin building a stockpile for your home, garage, or workspace, start with AA and AAA varieties. These are two of the most common types you’ll need. You can also add some C, D, and coin batteries — these are less common, but they're often needed when AA and AAA batteries aren’t.
When you buy Duracell CopperTop AA Alkaline Batteries, you’ll have great quality batteries in one of the most commonly needed sizes at your disposal. Another excellent option that packs plenty of value is a set of Skoanbe Button Coin Cell Batteries, which are affordable and versatile. Let us know which batteries are your favorites in the comments below.