Jul. 14, 2025
Selecting the right battery for IoT devices is paramount to ensuring optimal performance and longevity. When selecting a battery that aligns with the specific requirements of the application, guaranteeing a reliable and long-lasting power supply, one must consider several factors.
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The choice of battery should consider the application and device form factor. Coin cell batteries, although compact and suitable for low-power devices, have limited capacity and are non-rechargeable.
Lithium-ion (Li-ion) or lithium-polymer (Li-poly) batteries, offering higher capacity, rechargeability, and longer lifespans, are suitable for devices with higher power demands and longer lifecycles. Customized batteries may be necessary for devices with unconventional form factors.
Capacity, measured in mAh or Wh, refers to the amount of charge a battery can store. Energy density relates to the amount of energy stored per unit volume or weight. Selecting a battery with sufficient capacity and energy density ensures extended device operation without frequent battery replacements.
Ensure that the battery voltage aligns with the device's voltage requirements over its entire lifespan. Understand the discharge rate influenced by the application's use, such as data transmission frequency, intensity, and duration. These factors impact battery characteristics, including discharge rate and voltage drop over time, ultimately affecting power consumption and runtime.
Temperature significantly affects battery performance. Extreme temperatures can impact capacity, discharge rate, and lifespan. Select a battery with an operating temperature range suitable for the device's environmental conditions.
Consider battery conditions, such as self-discharge, both before integration into the IoT device and once integrated. Aging and self-discharge affect performance, so understanding these parameters during product development and post-market deployment is crucial.
Evaluate upfront cost and total cost of ownership over the battery's lifespan. Assess the battery's expected lifespan and balance it with the device's operational duration to optimize cost-effectiveness.
By considering these factors, developers can choose the right battery for their IoT devices, ensuring optimal performance, longevity, and cost-effectiveness.
As the prototype of your IoT device becomes available, initiating power profiling and estimating battery life becomes essential. This involves gaining a comprehensive understanding of the device's configuration and power consumption characteristics within its specific deployment context.
Consider the following details when conducting power profiling:
Continuous benchmarking is crucial throughout the product development process. Utilize UART clever printouts and correlate them with power consumption to identify specific components or features that may be draining energy.
This analysis will provide valuable insights into areas that can be optimized for improved power efficiency. Remember to turn off UART once the analysis is complete to avoid any impact on the final product.
Additionally, consider network variables that can impact power consumption. Import network log files to understand how factors like distance to the gateway or Node B, weather conditions, and device density within the network influence power consumption. These variables can significantly affect how the battery is drained and should be taken into account when estimating battery life.
By iteratively calculating battery life based on power consumption profiles throughout the development project, developers gain valuable knowledge and intuition about the factors that affect the power profile. This understanding allows them to maintain the desired power profile despite changes in the development stack, ensuring optimal power usage and battery life.
Choosing the right battery for your device is a crucial part of the design process, and it helps to know how to get the most out of your batteries when in the field.
Here we’ve collated some of our handy Energizing IoT articles that explore some of the key elements of selecting the right battery, integrating it into your device, and maximising its lifespan when deployed.
There’s a lot to think about when choosing the right battery for an IoT-connected device.
Wireless connected objects tend to require light and compact batteries with very high energy density and high voltage, which is why lithium batteries are best suited to IoT devices.
But what is the right lithium battery for your device?
Read our summary on how to go about choosing the right one for you.
Batteries come in various shapes and chemistries, with different benefits to each. One way of finding out if a battery matches your application’s profile is to review the datasheet against your design requirements – but how do you read these technical documents?
Are you interested in learning more about iot device battery? Contact us today to secure an expert consultation!
Explore our article on datasheets to find out how to analyze a battery’s specifications against your application’s profile.
Designing an IoT application involves a lot of choices. You’re looking for performance and quality, but balancing that alongside a low Total Cost of Ownership (TCO).
When it comes to your battery choice, it’s no different. And while price doesn’t always indicate quality, there are times when it can be a useful guide.
So, what’s behind the price of a battery? What are the elements that make a difference in a battery, and how do these elements impact the success of your project, the customer’s return on investment (ROI), and the satisfaction of the end user?
Read more on how to find value for money with your IoT battery
Just as there is no ‘one cell fits all’ solution to selecting the right battery, there is no universal solution to how you go about connecting a cell to a device.
The best means of connecting the cell to your device depends on a number of considerations – and finding the right connection for your application often comes down to planning.
Commit time in the early design process to consider the right battery, and then the right battery connection, as it will help with your product design and cost of total ownership (CTO).
https://www.saft.com/energizing-iot/integrating-batteries-your-smart-application
Some look to battery holders. They can be highly beneficial to some devices, particular in consumer applications (e.g., remote controls) where batteries can be replaced with ease. But there are drawbacks to relying on battery holders.
https://www.saft.com/energizing-iot/battery-holders-what-you-need-know
Developing a quality product matters. That’s why developers of IoT devices are meticulous in making sure the components of their products are as expected.
Once your batteries have arrived for use in your prototype application, you’ll want to check to see if they perform to the level required.
Here we explain how you can properly inspect your primary batteries to make sure they do just that.
Passivation is a surface protecting reaction which occurs spontaneously in all lithium batteries based on a liquid cathode, and it plays a major role in many of the beneficial characteristics that make lithium batteries a favorite choice for building smart devices. However, when not well managed, passivation can adversely affect the operation of the application.
Our application engineers see some common ‘passivation pitfalls’ when receiving new application design submissions – and the good news is they can be avoided.
Read more on how to avoid these mistakes.
There’s a lot that can determine the longevity of rechargeable batteries. It can be affected by the way the battery is charged and discharged, the operating temperatures, and more.
That’s particularly true of industrial grade lithium-ion batteries. These cells possess high energy density and can operate under extreme temperatures for a long life – but there are key things to consider if you want to optimize their lifespan.
Read our five top tips and delve a little deeper into ‘why’ and ‘how’ each is important.
Energizing IoT blog
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