Help When 15% battery low, the phone vibrates

[darpa999]

My current sound settings are Silent Mode enabled and Vibrate ALWAYS is selected. However, when my battery life level get to 15% or so, the phone starts to vibrate and it did in the middle of the night while I was asleep and its very annoying.

I want my my incomimg calls on vibrate mode, but how can I SILENCE the low battery level notification so it will not vibrate when the battery gets low?

Thanks