We are very sorry to hear about this experience, please try resetting the charger. To do this, simply unplug it for approximately 10 minutes and then plug it back in and try reinserting the battery. To ensure proper contact and secure placement, firmly push the battery into the compartment. You should hear a distinct click or snap, indicating it's properly seated Greenworks 24V battery and charger platform are covered by a three-year warranty from the date of purchase. If you have tried this suggestion and are still experiencing an issue, please start a Live chat on (www.greenworkstools.com) or call Greenworks toll-free helpline 1-888-909-6757. We would like the opportunity to speak with you to see if we can find a solution. All we ask is you have the battery, charger and tool with you at the time of your call so we can do the necessary troubleshooting test, thank you.