Another key FOB Question - Changing Battery?

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Mar 6, 2009
Between pixels
I got two factory key FOBs when I purchased my truck a couple of years ago. One never worked, and now the other one stopped working. I opened it up expecting a battery to fall out, but mine appears to be soldered to the circuit board (at least I cannot pull it off):confused:. It's a Lexus FOB (P/N 08191-60820). The no. on the battery is 304M 651. I've done a couple of searches, but it seems people just change the battery. Am I missing something here?

EDIT: I just found the battery on the back cover! :doh:. Sorry I don't know how to delete this thread.
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