Re: Remote Locks (archive)

Kevin--
Hi-- I was reading something a few years ago about the nominal rating of various electronic components such as transistors, resistors, etc. It mentioned that transistors that were rated for, say, 3 volts, were typically capable of operating at voltages considerably above and below that point-- 1 volt to 8 or 9 volts.

Another reason I would not be overly concerned is that your remote is not operated for more than a second or two at a time. It takes a while for a component to heat up enough to fail.

I had a pocket TV a few years ago that I would use either with batteries or a generic AC adapter. The adapter was designed in such a way that by sliding a switch back and forth, it could supply anything between 1.5 volts and 12 wolts, and on several occasions I found the switch had been slid all the way up to 12 volts-- it worked just fine, although it did eventually blow the fuse, which was a real pain in the butt since the fuse was soldered in place in a most inconvenient place. By experimentation, I found that it would also operate somewhat acceptably at voltages as low as 1.5.//Bill '88 735i

two or three times more, and at

The IR transmitter for the remote locks uses four mercury batteries. (Varta # V625PX) This was a pretty common camera battery a few years ago. Mecury batteries are no longer legally sold in the US, and the replacement 626 batteries are alkaline. The mercury batteries are 1.35 volts and the replacement alkaline batteries are 1.5 volts. Has anyone replaced their mercury batteries with the 1.5V alkaline batteries? Are there any known problems?
Is anyone aware of a BMW recommendation or service bulletin on this subject?
Thanks for your help.

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