Why does battery go dead when I have 49% life left

[iMore Question]

When battery gets to fifty percent life left ,it will shut off.

 

[Tartarus]

The battery in your iDevice needs servicing.

Please contact the nearest Apple Store Genius Bar or a certified repair service to have this done.

 

[Ledsteplin]

The battery is weak. It will soon need replacing. They do like that when they get old and weak.

 

[Rob Phillips]

Batteries age just like people. When they get older they tend to go to sleep earlier.

 

[Ledsteplin]

Batteries age just like people. When they get older they tend to go to sleep earlier.

In the recliner.