Why Is My Battery Charger Blinking Red. Red Light Blinking On Dewalt Charger Why. If the light blinks red in about 90 seconds after battery insertion then the battery voltage is too low.
Check the battery condition. The light turned blue and the phone was charging just fine. If the charger continues to flash red the battery is damaged or is faulty.
If charging is needed briefly drain the batteries before trying again.
When the red and green lights alternate then either the 72- Hour Safety Timer has been activated or the battery is defective. Three red flashes by the LED indicator is meant to convey that the battery charger has timed out. If the indicator light flashes red try the following suggestions. If the light blinks red in about 90 seconds after battery insertion then the battery voltage is too low.
