ive just bought a new replacement battery which works fine, however when the battery runs out, instead of going to sleep it just shuts off😕 then the clock and time is reset back to 1970 and i have to change it back.
Ok really. You might want to try resetting PRAM. Shut the computer down, and start it up again. After you press the power button, hold down the Option P and R keys until you hear a second BONGGGGG... see if that helps.