Just found MAKITA 18V 5.0AH LITHIUM-ION BATTERY WITH FUEL INDICATOR - BL1850B on sale.
The Makita BL1850B 18V 5.0Ah Li-Ion Battery charges faster and gives you longer runtimes than normal Lithium-Ion battery packs. The Makita 18V 5.0Ah Li-Ion Battery gives you unmatched performance and productivity on the jobsite and at home, with built-in shock absorbers that protect the cells from jobsite conditions.
The Makita 18V 5.0Ah Li-Ion Battery provides industry-leading run and charge times, with a charge time of only 45 minutes from empty to full. It also features an LED fuel gauge so you can monitor the battery's charge level without plugging it into a tool.
Features:
Built in memory chip communicates the usage history with the charger
Built in shock absorbers protect the cells from jobsite conditions
High energy cells pack more power per cell to reduce number of cells and overall weight
Large release button for easy removal from the tool
Built in air vents and wall cools the battery cells evenly whilst blocking damaging debris
16 contact terminals provide consistent power and firm hold in any environment
Cell Capacity: 5.0Ah
Charge Time: 45mins w/DC18RC
Net Weight: 615g
Voltage: 18V
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