Yes, that's true.
And it is especially unpleasant for Efika users, since the MAC switches when the battery is backed up. And the Efika batteries are failing fast (dunno if it is becaue bplan used crappy batteries (mine was panasonic one, generally not a shabby brand I'd say) abd lasted less than two years. other ppl reort even much fatser failings. Hopefully the new battery will last longer...