The SBT 520 AE 48v battery is compatible with the 500 Series mowers and garden tools and the 700 and 900 Series garden tools. 

2 lithium ion batteries that work simultaneously. they are more efficient and maximise power output. 

The twin design offers longer running times and product life. 

Specification:

• 48V – 4Ah
• 172.8W per hour
• 180 mins charging time (standard charger)
• 110 mins charging time (fast charger)
• Weight 1.39kg
• Warranty: 2 year domestic