My old Xena disc lock/alarm lost the will to live; while it still functioned as a mechanical lock, it refused to make a sound, despite cursing, cleaning contacts and installing new batteries.
So I took advantage of the warm day to ride up to Cycle Gear and get a new Xena lock. This one is more petite, but should still do the job. I know that if the a-holes want my bike, they’ll drag it off in spite of a squealing alarm, but the hope is that it would at least act as a psychological deterrent to the casual thief. Besides, it’s yellow, and they threw in a Xena cable for free. How could I resist?
This lock takes a single CR2 battery rather than the double stack of watch batteries required by the old one. I inserted the battery, reassembled the alarm module, and went out to the bike to try it.
Nothing. Not a peep.
I unlocked, reinstalled, relocked. Silent night. I wiped off the little reflector plate. Nada. Zilch. Argh.
Well, I thought, maybe I’ve installed the battery backwards… I went back into the house and disassembled the alarm module; the battery was installed correctly.
Wait — what’s this? I put on my reading glasses and, on closer inspection, realized that the battery was shrink-wrapped in thin, almost invisible plastic. Doh! I slapped myself on the forehead, and peeled the plastic off with a razor knife.
It hollers now: 120 ear-splitting decibels. That’s more like it!