The Makita 18V LXT starter pack, including two 4.0Ah batteries and one DC18SD standard charger.
A three-quarter profile view of a single Makita 18V LXT 4.0Ah battery, model BL1840B.
An infographic of the Makita BL1840B battery with text callouts highlighting its features, including Star Protection, 4.0Ah capacity, and LED indicator.
Angled studio view of the Makita DC18SD 18V LXT standard battery charger.
A transparent cutaway illustration of a Makita 18V battery, revealing the internal lithium-ion cells and circuit board.
A thumb presses the charge indicator button on a Makita 18V battery, showing a full 4-bar red LED display.
The Makita 18V LXT starter pack, including two 4.0Ah batteries and one DC18SD standard charger.
A close-up of a Makita tool's yellow battery receiver, noting compatibility with Star Symbol tools.
A marketing image titled "EFFICIENCY" shows a finger pressing the Makita battery's integrated L.E.D. charge level indicator.
The Makita 18V LXT starter pack, including two 4.0Ah batteries and one DC18SD standard charger.
A three-quarter profile view of a single Makita 18V LXT 4.0Ah battery, model BL1840B.
An infographic of the Makita BL1840B battery with text callouts highlighting its features, including Star Protection, 4.0Ah capacity, and LED indicator.
Angled studio view of the Makita DC18SD 18V LXT standard battery charger.
A transparent cutaway illustration of a Makita 18V battery, revealing the internal lithium-ion cells and circuit board.
A thumb presses the charge indicator button on a Makita 18V battery, showing a full 4-bar red LED display.
The Makita 18V LXT starter pack, including two 4.0Ah batteries and one DC18SD standard charger.
A close-up of a Makita tool's yellow battery receiver, noting compatibility with Star Symbol tools.
A marketing image titled "EFFICIENCY" shows a finger pressing the Makita battery's integrated L.E.D. charge level indicator.
Makita

Makita Cordless Battery Charger Starter Pack BL1840BSC2 4.0Ah (18V LXT Lithium-Ion Two BL1840B DC18SD Star Protection Power Tool Station Unit)

In stock
SKU: BL1840BSC2
$239.00 USD

Description

Makita Logo Logout

Makita BL1840BSC2 18V LXT 4.0Ah Battery & Charger Starter Pack

The Makita BL1840BSC2 18V LXT Lithium-Ion battery and charger starter kit powers over 325 cordless trade tools across commercial framing, mechanical installation, electrical rough-ins, and jobsite demolition. Featuring two 18V 4.0Ah lithium-ion battery packs (BL1840B) and a dedicated smart charger (DC18SD), this power supply package delivers up to 35% more runtime per charge compared to standard 3.0Ah cells while achieving full recharging in approximately 90 minutes. Equipped with Star Protection Computer Controls to safeguard against thermal overload, over-discharge, and current spikes, 16-contact holding rails for high-vibration stability, and sub-zero operating performance down to -4°F (-20°C), it equips trade professionals with dependable cordless energy and seamless bare-tool expansion.

Best Used For:

  • Makita 18V LXT Bare Tool System Building: Supplying continuous high-capacity lithium-ion power for cordless circular saws, hammer drills, impact drivers, and reciprocating saws.
  • 18V X2 (36V) Dual-Battery High-Demand Applications: Powering heavy 36V rotary hammers, chainsaws, track saws, and miter saws using two matched 4.0Ah packs simultaneously.
  • Sub-Zero Jobsite Equipment Operation: Delivering consistent electrical voltage and cold-weather cranking power in extreme winter conditions down to -4°F (-20°C).

Key Performance & Safety Features

  • High-Capacity 4.0Ah Lithium-Ion Core: Supplies up to 35% more working runtime per cycle than standard 3.0Ah batteries to eliminate frequent charging downtime.
  • Star Protection Computer Controls: Intelligent communication protocol protects connected tools and battery cells from overloading, overheating, and over-discharging.
  • Smart CPU Active Thermal Charging: Standard DC18SD charger actively monitors battery memory chips to regulate voltage, current, and temperature for a 90-minute charge cycle.
  • Integrated 4-LED Fuel Gauge: Onboard LED battery status display allows immediate charge verification before climbing ladders or scaffolding.
  • 16 Firm-Holding Contact Terminals: Multi-contact interface ensures continuous electrical conductivity and prevents power loss during heavy-vibration drilling or demolition.
  • Impact-Resistant Shock Casing: Rugged outer shell with a shock-absorbing inner liner shields internal lithium-ion cells against drops and rough jobsite impacts.

What's Included

  • (2) Makita 18V LXT® Lithium-Ion 4.0Ah Battery Packs (BL1840B)
  • (1) Makita 18V LXT® Standard Lithium-Ion Battery Charger (DC18SD)

Technical Specifications

Manufacturer Makita Corporation
Model Part Number BL1840BSC2
Cordless System Platform 18V LXT® / 18V X2 (36V) LXT®
Nominal Battery Voltage 18 Volts DC
Battery Capacity Rating 4.0 Amp-Hours (72 Watt-Hours each)
Battery Pack Model BL1840B (Quantity: 2 Included)
Charger Unit Model DC18SD Standard Smart Charger (120V AC Input)
Standard Recharging Time Approximately 90 Minutes per 4.0Ah Pack
Cold Weather Threshold Operational down to -4°F (-20°C)
Total Starter Kit Weight 5.15 lbs (82.40 oz / 2.34 kg)
Package Depth 9.50 inches (241.30 mm)
Package Height 3.50 inches (88.90 mm)
Universal Product Code (UPC) 197050359698
Suitable for material type Makita 18V LXT & 36V (18V X2) Cordless Power Tools

Pro-Tip: When running high-draw 18V X2 (36V) tools such as rear-handle saws or rotary hammers, always pair two 4.0Ah batteries that are at identical full charge levels; this balances power draw and maximizes runtime across both battery packs.