Woodbridge 
Makita BL1850B 18-Volt 5.0 Ah LXT Lithium-Ion Battery with Fuel Gauge charges faster and works longer than standard Lithium-Ion batteries, giving you and your cordless tools unmatched performance and productivity to take on the most demanding applications. The Makita 5.0Ah battery, model BL1850B, combines more run time (65% more run time per charge than the Makita BL1830 battery) with a category-leading charge time of only 45 minutes so it spends more time working and less time sitting on the charger. For added convenience, it also features an on-board LED charge level indicator to monitor battery charge. The 18-Volt LXT 5.0Ah battery is compatible only with Star Protection tools, indicated by the Star Symbol and/or Yellow Battery Receiver under the tool. Makita 18-Volt Lithium-Ion batteries resist self-discharge so they're ready for use even after long periods of storage. The Makita Rapid Optimum Charger (sold separately) is a smart-charging system that communicates with the battery during the charging process to monitor current, voltage and temperature. This advanced charging technology helps optimize battery life and deliver a faster charge. In addition, the Charger has a built-in fan to cool the battery for faster and more efficient charging, even in hot weather conditions. For improved tool performance and extended battery life, Makita created STAR Protection Computer Controls.
Features
- Integrated LED battery charge level indicator allows user to monitor battery charge
- Provides up to 65% more run time per charge compared to BL1830
- Reaches full charge in 45 minutes or less
- Compatible with 18-Volt LXT tools
- Battery delivers consistent power and run time in extreme temperatures, even in winter (-4 Degrees F/-20 Degrees C)
- Star protection allows the tool and battery to exchange data in real time to protect against overloading, over-discharging and overheating