General :: Enter Password To Use Encrypted Device Storage

I have a Galaxy SII i777 4.1.2, rooted. Things were going ok after the factory reset, but I noticed that the battery was taking forever to charge and was draining extremely fast. I don't know if the fact that the telephone was running my data manager, data usage defender, battery doctor, watchdog and memory booster for one day has anything to do with this (although the battery drainage and high consumption of data was before I installed those apps and it was the reason why I did installed them this time). But today (hours after I uninstalled battery doctor, data usage defender and memory booster) the battery got quickly drained and the phone seemed dead (it didn't want to turn on and i couldn't see the icon indicating it was charging when connected). So, I inserted my sister's battery, took it out, and put my battery again. This time the phone turned on, BUT I see a message saying "enter password to use encrypted device storage." I only use four passwords for all my accounts but none of them work. I have tried different wrong passwords (as recommended) like 30 times, and nothing happens. I read somewhere that I could start ODIN, which I'm not knowledgeable of. But I don't know what to do. I pressed the power button and the volume keys, and all is showing is a green man icon and a "Downloading" message. It's been like an hour already and it keeps "downloading."

I don't remember having encrypted my phone. And if I did, I could have only used one of my four passwords.