The Inspire 1 Battery Charging Hub intelligently charges four batteries together. The charging hub will monitor up to four batteries' status to ensure they are being fully charged. It will automatically start with the battery with the highest charge, bring it to full, then move on to the next battery. Each individual battery has its own LED indicating its status. Internal power management ensures that you can charge safely and without worry. An integrated port allows you to update future firmware releases. Compatible with both the Inspire 1-100W Charger and the Inspire 1-180W Rapid Charger. Work with both TB47 and TB48 battery models.