Me too, Raymond, I use only rechargeables. I still use the first pair of "C" NiCd's I ever bought, and they still last as long as ever. I prefer rechargeable alkalines now, though, because I don't have to drain them completely each time (NiCd's sometimes lose capacity if discharged only partially on a regular basis). Save bucks! I use the alkaline "AAA" in my LED's.
Blinkies: not always available, but check Wal-Mart for a little $3.00 job. I was amazed at the brightness at a distance. I bought a handful last time I found them.
I attached them with zip ties to parts of my bike that don't wiggle or move (vibration is unavoidable). So far, so good.
Pete