Maintenance mode in conventional rapid chargers simply consists of switching from rapid charging to trickle charging. This method continues to force energy into a fully charged battery which must be dissipated as damaging heat. The maintenance mode performs one pulse charge cycle every 15 - 45 seconds depending on the model. You can leave the battery in the charging system indefinitely. This technique extends the life of the battery from 5 to 10 times.
Battery is ready for use.
Battery can be removed and used now or anytime during the charge cycle without ever damaging the battery. If you leave your battery in the charger, the yellow charging light blinks on periodically to let you know that your battery's charge is being maintained at the proper level. Battery may be charged and can be immediately used. If left on the charger, charger will transfer to maintenance mode when safely cooled. Retry 4 or 5 times by removing and replacing battery.