This is much better than the standard charger. Charges faster, and when the charge gets low on the Roomba it finds it on its own and mounts it.

That sounded wierd but it works well.

• Accessory to Roomba Discovery Series models of floorvacs
• Fast-charging power supply; APS Fast Charge included
• Recharges a Roomba APS battery in less than 3 hours
• 2 convenient lights indicate power and charge function
• Measures approximately 13 by 4 inches