BL1850XDC18RD 18V 2 x 5.0Ah Batteries and Dual Port Charger
Features:
Makita 2 x BL1850:

BL1840Foam cell technology
BL1840Slide on battery - firm holding with multi contacts and shock absorbing pack, will not puncture and remains cool even in heavy use
BL1840Unbeatable 36 minute charge time
BL1840Same weight and size as 3Ah or 4Ah battery
BL1840Works with your current Li-ion Chargers
BL1840Longer run time and battery life

Makita DC18RD:

Built-in fan circulates air through the battery during the charging process to cool the battery for faster charge time
Optimizes battery life by actively controlling current, voltage and temperature
Communicates with each battery
Full charge sound alert
LED charging display
Twin charging ports
Forced cooling system
STAR Protection Computer Controls™
Energy storage capacity for long run times
Electronic current limiter for overload protection

Product Specification:
Makita 2 x BL1850:

Barcode: 5055945202007
BL1840Battery Ah: 5.0 Ah
BL1840Battery Type: Li-ion
BL1840Voltage: 18V

Makita DC18RD:

Barcode: 0088381444033
Part Number: DC18RD -240V
Battery Range: 7.2 - 18V
Battery Type: Li-ion
Input Voltage: 240V