Last updated: 17/10/2022

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Every day we use a variety of devices that depend on a power source to operate. For example, our mobile phone, remote control and some analogue watches require batteries in order to ensure timely performance. Without these indispensable complements you will not be able to enjoy their benefits.

But which ones to choose from among all the variety? Luckily, you’ve come to the right place. Read on and make the right choice.


  • Yes, having convenient batteries on hand is very important. However, there are sometimes concerns about their use and subsequent disposal. Further on in the buying guide you will find useful content related to common doubts of online users. Continue to enjoy this text and clear your uncertainty.
  • Alkaline or lithium batteries? You see, to make the right choice it is essential to define what you need them for. Soon you will be put in context, as we have prepared material related to these two variables. Once you know when to go for a particular type, your choice will be easier.
  • Head to the final section of the text and look at the comparative material that will allow you to take batteries home, whether you are looking for mobile phone batteries or accessories. Take a look at each factor and see for yourself how useful they are in terms of electrical energy.

The best Battery: Our Picks

Buying guide

Almost every type of electronic device uses batteries. That’s why one of the most common questions is: which batteries are the best for you? Fortunately, today we have a practical solution for you. In the buying guide we have prepared for you, you will have access to common battery questions and answers.

It’s worth investing in a portable battery for your mobile phone. (Photo: Vera Petrunina/

How to recharge rechargeable batteries?

To recharge your batteries, you need to use a special charger, whose function is to supply electric current to restore the battery to its original state. You can choose between simple, universal or smart models, depending on the characteristics of the product.

Once the power bank is connected to your mobile phone battery, the process will start automatically. On the other hand, if you are looking to recharge watch, AA or AAA batteries, after placing them in the space provided for this purpose, the charger must be connected to a power outlet until the process is complete.

  • Lithium batteries are rechargeable
  • Medium life cycle
  • High energy density
  • Low self-discharge rate
  • Everyday household applications
  • Pollute the environment
  • Some models may explode
  • Internal materials are harmful to skin
  • Low cold-charge capability
  • Require specialised chargers

Alkaline or lithium batteries – what should you look out for?

Looking for a device to power your electronic accessories? Go for electric batteries or accumulators, which are perfect for allowing current to flow out of the battery. But first, take a moment to find out which variables are available on the market, and which one is right for you.

Alkaline. They work thanks to the chemical reaction between two components: manganese dioxide and zinc. They are rectangular or cylindrical and have a higher energy density. The non-rechargeable 9-volt AA and AAA batteries are in this category. They must be disposed of in a container so as not to pollute.

Lithium. They offer the possibility of regenerating the charge countless times, which is why they are a high consumption battery in the telephone and accessory industry. Some models individually combine cobalt oxide, manganese oxide and iron phosphate. They have a lightweight design, as they are made of the lightest metal: lithium.

Alkaline Lithium
Rechargeable No Yes
Materials Manganese dioxide, zinc Lithium, cobalt oxide, manganese oxide and iron phosphate
Overheating No Yes
Leaks Yes No
Duration Low – about 1 year Medium – 3 years

How to dispose of batteries?

You should be aware that batteries are not thrown away in ordinary rubbish, mixed with household or office waste. They are pollutants of the soil and water that people drink. Therefore, it is best to opt for battery recycling in order to prevent heavy metals from increasing the risk of pollution.

To do this, go to a specialised collection centre or find strategic points in your city where environmental organisations place public containers. Take the batteries you will dispose of and leave them there. With this small action you will be reducing the polluting impact on your environment.

Look for charging systems that provide good usability and performance. (Photo: Arcaion/

Buying criteria: factors that allow you to buy and rate different battery models

We are pleased to welcome you to the final segment of this article. Here you will find quality material aimed at comparing the different options available on the market. It is worth taking the time to evaluate it. Once you do, make your final decision.

  • Presentation
  • Category
  • Design
  • Voltage


Basically, batteries come in two easy-to-choose formats. However, this aspect often confuses some buyers, as some variables vary from application to application. To give you a deeper understanding, we’ll explain what we mean below.

Rechargeable. We recommend purchasing rechargeable lithium batteries, along with the charger that will be used to renew the charge, if you are looking for products that you can use as many times as you need. For example, they are excellent complements for digital cameras, remote controls and torches.

Pre-charged. Choose good quality alkaline batteries if you will only use them once or until they run out of power. It is important that you use them correctly, and avoid trying to recharge them so that they do not overheat. They lose little charge during periods of inactivity, which is why they are sold at a higher price.


The American National Standards Institute created the nomenclature that categorises batteries in 1974. The idea was to classify rechargeable devices compatible with certain equipment. To know which batteries are right for you, it is important to consider this classification.

AA. Take home a pack of AA-denominated batteries and put them in devices such as stopwatches, watches, toys, and cameras. Check whether they are rechargeable or non-rechargeable, as the former provide up to 1.2 volts (V), while the other presentation amounts to 1.5 V.

AAA. They are designed for medium-sized devices. For example, they will be useful in remote control mechanisms such as remote controls for televisions and drones. Carry this portable power system in its disposable version for other electronic devices that require them.

AAAA. It is advisable to select AAAA batteries to power small items. These include torches, tiny headphones, glucose meters and even laser pointers during academic presentations. Before choosing them, consider which format works best for your product.

Did you know that batteries are classified based on their components and technology for commercial purposes?


This aspect has a decisive influence on the purchase. Of course, in addition to other factors, this power system must be compatible with the space provided for its use. For example, a cylindrical battery will not work in a rectangular opening, right? That said, learn how to choose the best ones.

Cylindrical. Carry alkaline or lithium batteries made this way, in their AA, AAA and AAAA designations, to share the charge with objects that need it. Please note that the manufacturer does indeed recommend their use, and if so, buy as many as you need in packs of 1 – 12.

Rectangular. Unlike the previous ones, this robust design is a battery with one connector and two terminals. We recommend their use in acoustic equipment such as electric guitars. Also to power smoke detectors, some toys, or as a power supply for electric clocks requiring 9V power.

Push button. Their disc shape allows them to fit into circular spaces. Choose them to optimise the operation of your portable devices: wristwatches, audio players and calculators. Their voltage ranges from 1.2V – 3V, so check which one is suitable for the unit where it will be placed.


We know that the actual capacity of the power system is highly dependent on the voltage. Therefore, the latter must be equivalent to the device where it is used. However, it is worth distinguishing between the most common or standardised considerations, so that you have a concrete idea of the ideal potential.

1,2 V. This electrical potential usually corresponds to AA and AAA rechargeable items. Despite its low voltage, it will work in industrial, medical and household applications. This voltage will definitely not work in devices that demand more power. So it is wise to evaluate your applications.

1,5 V. You will commonly get standardised 1.5 V batteries for electronic devices and phone accessories. Distinguish between the cylindrical and button design before carrying them, as they must be perfectly adapted to the device where they will be used. As you can see, it is not enough just to order batteries with this voltage from the supplier.

6 V – 9 V. Consider purchasing 6-9 V models because of their average life span, which will keep the device powered for at least 230 hours at maximum performance. They are also an excellent recommendation for academic projects and high power when connected together.

If you’re not buying recycled products, you’re not really recycling. Ed Begley Jr.

(Featured image photo: Anton Estrada /