I've got a G4 powerbook I've had since about 2001, and I've recently fitted it with a replacement superdrive, battery and 1G of RAM (second-hand except for the chip). Since then the battery doesn't seem to charge, Opera and Safari shut down on their own constantly, the mailbox cleared itself and is now basically useless and the clock keeps reverting to 1970. Is it going through puberty or should I bin it and buy a Mac Air?