Mine also blinks red. I have never really noticed it blink a different color even though I would think it would lol.
Just do like me, keep an extra battery in your pocket along with your inhaler...you'll never worry.
I went to see the technician who fitted me with the WalkAide. The flashing red light in my particular case, meant my WalkAide memory was full. The last time I saw her, her WalkAide laptop was broken. She was unable to plug
into my WalkAide. She downloaded my WalkAide info into her laptop and the flashing red light disappeared.