How long does it take to charge an electric bike?

To fully charge an electric bike battery takes 3 to 6 hours.

Bosch 4A Standard Charger.
Takes 4.5 hrs to charge a 500 Wh battery.

It is very easy to charge an electric bike and you can charge most eBike batteries whilst they are still clipped on to your bike (or you can remove the battery for charging if you prefer).
To charge your eBike simply plug the small charger into a wall socket.

The actual time to charge an electric bicycle battery depends on:

  • The capacity of the battery. The larger the battery capacity, the longer the charge time.
  • The power of the charger. Travel chargers and car charges may charge at half the rate of a standard charger. See notes on Ultra Fast chargers below.
  • How flat the battery is at the start of the charge cycle (batteries last longest when operating between 30 and 80 percent of capacity. Try to avoid fully discharging your battery as this reduces battery life.
  • The battery technology (lead-acid, Lithium Ion etc).

Topping up the last 10% of a battery is the slowest part of the charge cycle – so getting to 90% charge can be considerably quicker than a full charge cycle.

Charge an electric bike battery using ‘Ultrafast Charging’

Electric bicycle batteries are best charged slowly, however some batteries and chargers support ‘Ultra Fast charging’.

Charging a Lithium-Ion battery too fast is hard on the battery, and it will reduce its life expectancy. In extreme cases, it can be a fire hazard. Using the charger that came with your eBike is the safest option and will maximize the life of your battery.
Where possible, charge at a moderate rate. Ultra-fast charging always causes battery stress.

With Ultra Fast charging it is important to note that :

  • Your battery should be a type suitable for ultra-fast charging.
  • Check your the battery is in good condition as ultra-fast charging puts higher stresses on your battery .
  • You should always use a charger that has the correct specifications to work with your battery.
  • It is best to charge at moderate ambient temperatures. Do not use a fast charger when the battery is hot or cold.
  • Avoid fast charging a damaged, aged or low-performing battery.
  • Ultra-fast charging only applies during the first charge phase (up to 70% charge).
  • If you are shopping for an ultrafast charger look for one which has a charge-time selector to allow a slower charge when time allows. Selecting the slower charge option will help extend the life of your battery.

Related posts

Share your thoughts