Default [Q] Desire X Dual SIM fully uncharge problem!

when my device gets fully uncharged (when i turn it on after getting turned off due to low battery) I can't turn it on easily, actually I don't know how I should turn it on, while plugged to charger I try holding power button for 3 seconds and shorter nothing happens, pressing for 15 seconds makes it vibe 5 times at some point latter.
so how should I deal with this situation?