I've been using the same 2 remotes for my pickup for about 18 years. They both work. I keep one in the house in a cupboard and, every 6 months or so, I swap it for the one on my key chain.
Yesterday was a "swap remote" day, but I also decided to test the remotes - see how far from the pickup I could stand for the remotes to still work. The result was about 4 metres. That's OK.
I then decided to change the batteries in one of the remotes to see how much further I could stand away from the pickup.
I have some spare Panasonic CR2016 batteries so replaced the 2 inside one remote with the two new ones.
The remote didn't work at all.
So I measured the voltage of the new batteries using my DVM - they are at 3.31v and 3.29v.
The "old" batteries are at 3.05v and 3.15v.
I put the old ones back and the remote worked.
Again I put the new ones in and it didn't work.
I also noticed that the new batteries produced a much dimmer light from the remote's LED.
I'm now back to using the old batteries.
Could it be that the "new" batteries don't produce the power necessary to make the remote work, even though the DVM shows them at a higher voltage than the old ones?
I'm stumped! ????