Is there any voltage limiter in line with the the 928 clock? (digital or square analog) I thought I saw somewhere on here that it was a bad idea to hook the clock directly to a 12v battery to test. The positive terminal on both types of clocks have 12v stamped next to it, so it seems like the clock could be tested with 12v coming directly from any 12v source, battery or otherwise? Right?

 

Tested mine directly from the battery with no issues