However long the charger takes. I would reckon a good time to be approx 2-3 hours.
Duracell FTW
About eight hours
it take an duracell battery in a flashlight non-stop lasts exactly 15 hours
This depends on the working conditions.
That's going to depend on how often, and for how long, the flashlight is turned on.
It depends entirely on the discharge current. If you require an accurate answer you should contact Duracell and request technical assistance.
Battery brand isn't that important. The time to charge is mainly dependent on the capacity of the battery and the capacity of the charger. Any reasonable modern charger should sense when the battery is full and cut power when it's done. It can take some hours for a full charge.
Depends which size of battery, what you are powering with it (motors take more power than radios), and which grade of battery you are using.
Duracell has been a trusted brand for decades and they produce battery types which are suitable for all toys. Batteries by Duracell are long lasting and safe for children.
No set answer to that, it depends on the size/capacity of the battery and what it's powering.
Duracell rechargeable batteries are reliable, but like any brand of batteries, the life will depend on how the batteries are used, maintained, and stored. Rechargeable batteries do not have as long a shelf life as most other batteries, so they do have to be maintained. With proper care the Duracell rechargeable batteries will give you many hours of camera use, but it is always wise to carry extras.
2 hours