Default HELP My qtek doesnt work-Battery dried out during ROM installation

During installation of ROM update, my phone stopped and it doesn't start.
I think it is because of battery.
There wasnt enough battery and i think it dried out.
Now I know that it had to have at least 50% of charge but it is too late for that. (i had stg like 40% of charge)

Is there any way to charge it and install new ROM?

please help.

Thanks