EX5-UR 8 X AA 電volt 跌到幾多就要換？

請問各位師兄，
EX5-UR 8 * AA 電volt數跌到幾多就要換新電？
因為我的EX5-UR顯示volt數 約11.9，已控制唔到。是否要換新電？
本人是新手，多多包涵。

For 8x AA batteries, the maximum voltage should be 1.4x8=11.2V. How can it become 11.9, it is impossible.
May be is it 9.9V, you had made a mistake.