Genuine Makita BL1850B 5.0ah 18v li-ion battery with indicator, uses an optimum charging system that will outperform the run time to previous Makita li-ion batteries,

Specifications:

• Up to 66% extra run time compared to BL1830B
• Compatible with existing fast chargers
• Computer controlled optimum charging
• Compatible with starred terminal machines
• Compatible with yellow terminal machines
• Cooling System for max battery life
• Battery protection circuit
• 45 Minute Charge Time
• Same weight as 3.0ah
• Genuine Makita Battery