Xperia NEO 0% battery issue , and "anowing bootloader unlock= NO"

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http://forum.xda-developers.com – HI, I wanted to root an Xperia Nei mt15i, i found an article with a step by step guide ,which said downgrade the firmware to 2.3.2 then gingerbreak etc etc, and well now the phone says that the battery is empty, and i cant install a custom firmware becouse i cant unlock the bootloader, so i cant get in fastboot mode, anyone can help please?:confused: (HowTos)