What do the flashing LED lights mean on RYOBI 18V Single Chargers?

This LED guide applies to the above listed single-port charger models. For 18V Dual or 6 port chargers, see: What do the LED lights mean on RYOBI 18V Multi Chargers?

Charger LED Indicator		Battery Pack Status	Red LED	Green LED	Action
	Power	Without battery pack	ON	OFF	Ready to charge battery pack
	Evaluate	Hot battery pack	Flashing	OFF	When battery pack reaches cooled temperature, charger begins fast charge mode.
	Evaluate	Cold battery pack	Flashing	OFF	When battery pack reaches warmed temperature, charger begins fast charge mode.
	Evaluate	Deeply discharged	Flashing	OFF	Charger pre-charges battery until normal voltage is reached, then begins fast charge mode.
	Defective	Defective	Flashing	Flashing	Battery pack or charger is defective.
	• If defective, try to repeat the conditions a second time by removing and reinstalling the battery pack. If the LED status repeats a second time, try charging a different battery. • If a different battery charges normally, it's likely an issue with the battery.  • If a different battery also indicates "Defective," the charger may be defective.
	Charging	Fast charging	OFF	Flashing	-
	Full	Charging complete	OFF	ON	Battery ready to use.

If your battery isn't charging, see: Why isn't my RYOBI Battery charging?

If your battery is defective and it’s still within the warranty period, take it back to the retail store along with your receipt or proof of purchase for warranty assessment.