Does my battery need to be replaced? Or is something else going on?
My OP-1 hasn’t kept a charge in over year.
However, up until last week it’s always worked when I plugged it in.
Now it won’t turn on at all.
Is this a battery issue or something else?
Also, while I was previously able to use it when plugged in, it would often give off a constant high pitched hum until I unplugged it and plugged it back in…