Why can’t phone companies or laptop companies make it so we can charge our devices almost instantaneously?
In: Technology
Mostly because any battery system has to be a compromise of several factors that work against each other.
1) Cost
2) Safety
3) Amount of charge it can hold (devices need to work on battery for some time)
4) Speed of charge/discharge
5) Space/weight
So you can get a quick charge battery, but to make it small enough and if it doesn’t cost a lot, the amount of charge might be too small – your phone or laptop can only last 15 minutes – which is practically useless for a user.
Or if you ignore size and weight, you can probably design a battery that can charge quickly and hold a lot of charge, but it needs special cooling etc and your laptop and phone weighs 10kg and the size of a suitcase – again not too many people will buy this.
It is like asking a vehicle manufacturer to build a car that is as small and maneuverable as a bicycle, can carry 10 tons like a truck, has the acceleration and speed of a sports car, and has the fuel consumption of a motorcycle. We can imagine it but it isn’t practically makeable.
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