Dell Inspiron 5010 bios cracked while updating

As the battery wasn't being charged more than 53 percentage, looking somewhere in the internet i decided to upgrade the bios from A13 to A 15. After downing the file from dell support website, I started upgrading but showing battery low it couldn't updated. It beeps and runs the cpu fan when powe button is pressed but black screen. Please help me i want to use this product more as it is my favorite laptop