Please remove the battery from the Slinger to assess the battery connection cable. NOTE: The Slinger Bag must be unplugged from the charger before removing the battery for safety reasons. 2. Check the adaptor on the plug to the charger to see that it is securely attached. It will "click" in place when properly inserted. For clear instruction on this step please access our Battery Manual here. 3. Next, be sure that the charger connection that is inserted into the front panel of the Slinger is fully inserted. When charging, the charger will display a RED light. When charging is complete, the light on the charger will turn green. 4. If you are having trouble charging the battery, make sure that the power cable has not become disconnected from the battery. If none of these steps work, contact our support team at support@slingerbag.com for further assistance.