Hello anonymous,

Thank you for your review. We are sorry to hear about the experience you have encountered with this product. Here are a few troubleshooting suggestions to check out. 1) When the battery is inserted, the light should begin flashing green to indicate the battery is charging. If this light is not igniting or is flashing red, this may indicate an issue and we would be interested in hearing more about this. If the light simply goes solid red, try removing the battery and unplugging the charger for about 10 minutes and place them both indoors in a room temperature setting, as this might indicate the battery is at the incorrect temperature to be charged. 2) Ensure that the battery has been fully inserted into the charger. Sometimes this requires a firm push into place to make sure that it has been properly seated. 3) 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. If the charger has been plugged in for extended periods of time, this can sometimes cause the charger to malfunction. Please note that our GreenWorks batteries and chargers are covered by a 2-year warranty from the date of purchase. If you have tried these suggestions and are still experiencing an issue, please kindly give us a call at 1-855-345-3934 or by email on info@greenworkstools.com for further assistance.