Back in 2004, , WHRRI required we buy AMB transponders. We were given a choice of hard wire or battery. I chose battery as I was planning on selling the car. Fast forward 14 years and Yesterday I discovered it sitting in the box with the charger. I plugged it in and after 10 hours, I get 3 green flashes, pause, then 3 green flashes repeating . There is no on/off button that I can see. Is this appropriate? So does it wear down and then needs to be recharged. Shouldn't there be an on /off switch? I have misplaced any paperwork that came with it. any help appreciated.
FV13