Charging batteries

[Ama ride ride]

Can one charge a bikes or any vehicles battery while the battery is still in and connected.? Ignition off of course.

Knowing this may seem a stupid question but I just realize I dont know the answer. ???

 

[Smuggy]

 

[Ama ride ride]

 

[WheelieDog]

 

[eberhard]

 

[silvrav]

 

[TheBear]

 

[zebra]

 

[Ama ride ride]

 

[Smuggy]

 

[zebra]

 

[Ama ride ride]

 

[T Rex]

 

[Black_Hawk]