The short answer
Every lithium battery loses a small part of its capacity over time, whether you charge it fast or slowly. What speeds up that loss is high heat, long periods at a very high or very low charge level, and high current when the battery is not in a suitable state. Fast charging raises heat and current, but your car's battery management system watches this moment by moment and lowers the power when needed.
What does the data say?
In 2023, Recurrent, a company that specialises in battery data, analysed data from more than 12,000 Tesla cars. It compared cars that fast charge for most of their sessions with cars that rarely do. The study found no significant difference in range loss between the two groups. It covers one brand, in climates different from Jordan's, but it matches what manufacturers say: fast charging is a normal part of using the car.
That is also why many manufacturers give long battery warranties, often up to 8 years or a set number of kilometres, without asking you to avoid fast charging. Check the warranty terms for your own car.
Heat is the biggest factor in Jordan
In the Jordanian summer, the battery gets hot after a long drive. If you reach the charger with a very hot battery, the car lowers the power automatically, and charging may seem slower than usual. That is healthy behaviour that protects the battery, not a fault in the charger.
- In summer: if you can, do not leave the car charged to 100% parked in the sun for hours.
- In winter: a cold battery charges slowly at first. If your car can precondition the battery before charging, turn it on before you arrive.
Habits that extend battery life
- Charge to 80% for daily use. Keep 100% for long trips, unless your car's manufacturer recommends otherwise.
- Do not leave the battery near zero for long. Getting down to 10% or 15% and then charging is normal, but leaving the car almost empty for days is not healthy.
- Mix it up if you can. Slow home charging overnight plus fast charging when you need it is an ideal mix, but relying on fast charging alone is not a mistake.
- Know your battery type. LFP batteries, such as the Blade battery in BYD cars, tolerate full charges better than others, and some manufacturers advise charging them to 100% regularly to calibrate the charge reading. Follow your car's manual.
When should you actually worry?
If you notice a large, sudden drop in range, battery warning messages, or charging that is always very slow on every charger, see the dealer or a service centre. These signs need a check, and they usually have nothing to do with the occasional fast charge.
To see how long a fast charge takes and why charging slows after 80%, read the charging time guide.
Frequently asked questions
Does fast charging every day damage the battery?
The available data does not show major harm from regular fast charging, because the battery management system protects the battery. High heat and long periods at 100% do speed up wear, so charge to 80% and avoid leaving the car fully charged in the sun.
Does fast charging void the battery warranty?
Many manufacturers do not exclude fast charging from the warranty, but terms vary between manufacturers and between dealers. Check your car's warranty booklet.
Why is charging slower in summer?
Because the car protects a hot battery by lowering the power. This is the car itself, not a fault in the charger.
Should I charge to 100% on a fast charger?
For daily use there is no need. Charging after 80% is slow and slightly harder on the battery. The exception is when the manufacturer recommends regular full charges for LFP batteries.