Makita BL1850 18v 5.0Ah Li-ion LXT Genuine Battery And Charger
Features:
Makita BL1850:

The Li-ion range delivers 430% more working capacity during it's lifetime compared to Ni-Cad and is 40% Lighter than Ni-MH.
The Li-ion has minimal depletion of power during use or in storage over it's lifetime.
Unbeatable 45 minute charge time.
Same weight as 3.0Ah battery.
Works with your current Li-ion Chargers.
Longer run time and battery life.
All new 5.0Ah models are compatible with 18V 3.0Ah and 4.0ah Li-ion batteries.
STAR Protection Computer Controls™
Low self-discharge
Energy storage capacity for long run times
With overload, over discharge and overheating protection

Makita DC18RC:

The Makita DC18RC Li-ion 14.4v - 18v 22 Minute Charger uses Intelligent Charging Technology to control current, voltage and temperature to maximize the battery life.
Charges Makita 7.2 -18V 3Ah Li-ion batteries in approximately 22 minutes.

Product Specification:
Makita BL1850:

Barcode: 0088381448291
Battery Ah - 5.0Ah
Battery Type - Li-ion
Voltage - 18v
Battery ID - BL1850

Makita DC18RC:

Charges 7.2-18V Li-ion batteries