Must I keep a ball in the repressurizer?

[neilers]

Hey,

I'm thinking about buying a pressureball pressureizer to ensure my 43 tennis balls keep their bounce.
The thing is, some of these balls have lost a bit of pressure and don't bounce as well as a newly opened ball.

I'm curious as to, if I recharged the pressure on a tennis ball, and left it outside. (Not playing with it, just in a bag or plastic), would they lose their bounce when being stationary, not in a pressureball case?

 

[oble]

Yes, they will still gradually lose pressure and therefore the bounce. They just don't deflate as quickly as when they are being whacked around.