BlackBerryerror 10-0020

I got that error yesterday and looked on forums, everyone was like replace the battery but how could you for a classic so after hours of research etc. I restarted my many times and it would connect then disconnect, after a bit somehow I got it to stay connected and reloaded the software. wheww that was the death of me. Don't know how it happened out of the blue

Posted via CB10

i have blackberr z10 it is giving same error i replaced 3 batteries but it dsnt turn on can anyone tell the sloution pllzzzz