For Makita 18V Battery Replacement | BL1860B 6.5Ah Li-ion Battery With LED Indicator I BL1840 BL1850 BL1830 Chargers & Adapters The third prong is for

The third prong is for a temperature sensor that helps control the charging and it is much safer

TD133DRFXB

Capital: 5

Double Run Time Than BL1830 Battery

And Also All the Vanon Replacement batteries For Dewalt 18V Series

For Makita 18V Battery Replacement | BL1860B 6.5Ah Li-ion Battery With LED Indicator I BL1840 BL1850 BL1830 Chargers & Adapters The third prong is forPerfect Fit For All 18V Makita Li ion Battery Specifications: Voltage: 18V Capacity: 6500mah 6. 5Ah Color: Black Type: Li ion Wattage: 117Wh Condition: Brand New Features: Integrated L. E. D. battery charge level indicator allows user to monitor battery charge Provides up to 2X more run time per charge compared to BL1830 3. 0Ah Reaches full charge in 55 minutes or less FCC, CE and RoHS certified. Built in protective functions against overloading, over