this post was submitted on 16 Sep 2023
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Why does it matter if it charges from 10 to 80% in 20mins? Seems a bit arbitrary. Why not give us the time to charge to 100%? Does the last 20% take longer or something?
Yes. There's chemistry and physics reasons but primarily it's to protect the battery from overheating and prolonging the life of the battery. Same applies for your phone or laptop battery.
Similar to phones
https://www.howtogeek.com/684383/why-do-smartphones-charge-so-much-slower-as-the-battery-nears-full
Thanks! To be honest I never really paid attention to charging much, just plugged it in every night and left it at that.
Which is what people usually do with EVs, funnily enough.
Exactly, charging 80-100 is much slower than 0-80.
The Hyundai Ioniq 5 and Kia EV6 both currently advertise charging from 10%-80% in 18 minutes (under ideal conditions). Charging from 10%-100% takes around 50 minutes (under ideal conditions).
So 10%-80% in 18 minutes, and 80%-100% in 32 minutes. So if you need to go far, it's also quicker to charge to 80%, go as far as you can and then charge to 80% again.
It's also important to note that charging to 100% puts much more wear and strain on the battery, so if you want your battery to keep it's capacity for many years, you should avoid charging beyond 80.