Let's rule out having to repair the phone itself before we have to. Are you using your friends charger? Sometimes cellular device don't react kindly with chargers that were not factory made specifically for it. Perhaps try plugging it into another wall. Is your phone turning on at all? If it looks like the phone is indeed responding to responses but the screen isn't on, try taking a look at the Samsung Galaxy Rush Troubleshooting Page. If all else fails you might actually have to order a new battery which is actually a painless process to fix on this phone.