The orange light will be on when charging, but blinking could indicate a problem with charger itself. Does it ever turn green? have you tried a multimeter, you can get a cheap one at harbor freight and see what voltage it being sent from the charger. Does the battery seem to be charging? Amazon is the best place to replace it if you need to....if the battery isnt recharging, i woulod just do that.
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The orange light will be on when charging, but blinking could indicate a problem with charger itself. Does it ever turn green? have you tried a multimeter, you can get a cheap one at harbor freight and see what voltage it being sent from the charger. Does the battery seem to be charging? Amazon is the best place to replace it if you need to....if the battery isnt recharging, i woulod just do that.