hello every body ;
i had a shutdown problem on my BB Z10 STL100-1 on a daily basis when the battery reaches 40% of its life , and know it is solved after i downloaded the new os release 10.1.0.4181 .
i also downloaded Max battery Optimizer and the battery now operates for 1.5 days with no issues .
thanks

That's neat!

That's the opposite of my friend's Z10 that won't turn off. It shuts down but them automatically reboots every time. Hmmmm...