This typically happens when there is not good contact between the battery and the charging contact point. You may need to spin the batteries while they are on the charger and the lights will stabilize.
Charging Indicator Lights
– Turns green and progressively blinks green to indicate proper charging
– Turns solid green when charging is complete
– Flashes red when batteries are inserted backwards
If the green indication light does not come on after 8 hours of charging the batteries, then it is possible the charger is damaged. This may have happened during product shipping or the item was dropped. Submit a Support Ticket so we can help you resolve the issue and/or replace the item.