• 14.4 V 2.5 Ah high-capacity lithium battery (36 Wh)
• Weighs just 12 oz; fits 14.4 V and most 7.2 V 661 Series tools
• Fast 70-minute charge time
• No memory effect or self-discharge
• Glass-filled nylon housing for durability
• Operates on CTC772, CTC131, CTC131A and CTC123 chargers