Why is battery life so different on different devices?


Some of us have terrible battery life on our laptops or smartphones, but some of us also have amazing battery life! There is a simple reason behind this.





Different devices have different specifications, let's say you have 2 laptops, Laptop #1 has a weak Intel Celeron CPU with no GPU, and Laptop #2 has a very fast Intel Core i9 CPU with an NVIDIA 1050 TI GPU. Laptop #1's battery will last longer, because it doesn't have a GPU taking power from the battery, and the CPU takes less power from the battery because it is a weaker CPU that isn't as powerful as Laptop #2's CPU. Laptop #2 will die faster because it has a GPU which takes a lot of power from the battery to process graphics and a really good CPU that is much more powerful than Laptop #1's CPU, meaning that it will use a lot more power.





The same goes for different types of electronics, like rockets, cars, and more. If an electric car is heavier, it needs to use more power to physically move, leading to your battery dying faster. If an electric car is lighter, it uses less power. You are technically able to replace your battery, to get a new and more powerful one, but they all have pros and cons.





Now, you can get more battery life by constantly charging your battery with solar power, or clean hydrogen fuel cells. But both of these can be rather complicated. Your battery life all depends on the type of battery you are using and how much power is being taken away from it. Battery life may shorten over time due to components in the battery dissolving and fading away, making it harder for the battery to charge each time it is being charged.





Batteries inside eventually shrink over time and form tiny cracks inside the material, causing the battery to not be able to store as many ions as usual, giving it less electrical charge. If you can find a good battery that barely decays over time, your battery life will not noticeably shrink until many years.





Pros and Cons for both battery types: Alkaline batteries have a higher density inside, meaning they can store more electric charge, while releasing the same voltage. Alkaline batteries do not degrade after leaving the factory, but lithium ion batteries do. Another good thing about Alkaline batteries are, they have no harmful molecules that can pollute soil, but lithium ion batteries do. Lithium Ion batteries often can burst into flames causing destruction, but Alkaline batteries do not often do this. Lithium Ion batteries will degrade even faster when exposed to hotter temperatures, unlike Alkaline batteries. Alkaline batteries are the way to go, plus, they are cheaper.