Is charging of a battery linear?

[deepakvrao]

Dunno what word to use but if my battery goes from 75% to 95% in 30 minutes, does it mean that the battery will get fully charged in 2.5 hours?

Any personal experiences of how long it takes to fully charge a 13" 2011 MBA?

 

[miles01110]

http://www.apple.com/batteries/

 

[Powermax]

No it is not linear. At first, it is really fast. Towards the end, it gets slower and slower.