How long does the battery last on my Wireless 2.4GHz Headphones after a full charge? The battery will last approximately 5 hours after a full charge. Related articles How long does it take to charge a flat rechargeable battery with my Universal Charger? Kogan Agora Charging Troubleshooting How to conserve battery life on your smartphone Can I return my item? Information for Change of Mind returns and faulty items. How Do I Replace the Remote Battery on My Kogan HD Action Camera?