Figure i would ask, i have a Amiga 1200 i havent fired up in like 3 years. But i will check it.
Like alx said, A1200 doesn't have battery on board. A500, A600, CD32 and CDTV don't have it either. A500+ (with
Rev 8A motherboard) has a battery (and probably the RTC also) on board.
With A1200 the accelerator typically provide the real time clock (RTC). At least phase5/dce accelerators use battery that doesn't leak.