Memory and internal batteries: know what could be lost before intervening

Some instruments use internal batteries or other systems to retain data, clock settings or configuration.

Before replacing an internal battery, verify the specified procedure, whether a backup is required and whether access involves disassembly or soldering. On older instruments a leaking battery can become a serious problem, so do not ignore warning signs or manufacturer service intervals.

If access requires technical skills, save available data first and use a professional technician.