When you plug your vexilar into it, does the red light come on?
Is the battery charged when the red light goes off?
IF so, I wouldn't worry about it.
You could get a new one, they aren't that expensive.
I bought one that I can plug into my truck, when I'm gone for a couple of days.
That way, I can recharge my Vexilar while I'm driving Home, or to the next spot.
Wiener