Milwaukee 48-11-1813X M18 REDLITHIUM FORGE HD12.0 High Output Battery Pack

Built for high-demand cordless tools, the Milwaukee 48-11-1813X M18 REDLITHIUM FORGE HD12.0 Battery Pack delivers serious output, fast turnaround on the charger, and long service life for crews who run their tools all day. Rated at 12.0Ah, this pack supplies extended runtime while delivering 50% more power than the HIGH OUTPUT™ HD12.0, so grinders, SDS-MAX hammers, table saws, and large circular saws stay in the cut under load. It’s COOL-CYCLE™ capable, meaning when paired with COOL-CYCLE-enabled chargers—including the M18 Dual Bay Simultaneous Super Charger—the pack receives high-speed active cooling, reducing downtime between tasks. In fact, it can reach 80% in ~35 minutes on the Super Charger, keeping production moving on fast schedules.

To survive real jobsites, FORGE adds an upgraded venting design with a patented ingress coating and a solvent-resistant housing that stands up to oils and greases. REDLINK™ Intelligence manages performance and overload protection by communicating across the tool, pack, and charger for consistent output and pack safety. An enhanced, high-visibility fuel gauge makes it easier to check status in bright sun. Fully compatible with 250+ M18 tools, this pack is a direct performance upgrade for existing fleets that need more power, faster charging, and long life without changing platforms.

Milwaukee M18 REDLITHIUM FORGE HD12.0 High Output Battery Pack At a Glance

• 50% more power vs. HIGH OUTPUT™ HD12.0: Drives demanding M18 saws, grinders, and rotary hammers with authority.
• Fast turnaround: 35-min supercharge to 80% on the M18 Dual Bay Simultaneous Super Charger.
• COOL-CYCLE™ capable: Active cooling with compatible chargers cuts wait time between cycles.
• Longest life in the lineup: Built for the most recharges and consistent performance over time.
• Jobsite-ready build: Ingress-protected vents and solvent-resistant housing help defend against dust, oils, and weather.
• Smart protection: REDLINK™ Intelligence optimizes output and guards against overload.
• Clear status: Bright, easy-to-read onboard fuel gauge.
• System fit: Works with 250+ M18 cordless tools.

Markets

• Commercial Construction & Demolition Runs high-draw tools for cutting, grinding, and coring with fewer changeouts.
• Industrial Maintenance & Plant Services Fast charge turnaround to support multi-shift repairs and shutdowns.
• Concrete & Masonry Powers SDS-MAX and heavy drilling/chipping with consistent torque.
• Metal Fabrication Feeds large grinders, band saws, and sanders through continuous production.
• Carpentry & Framing Keeps table saws, circular saws, and routers moving on battery.
• Utility & Field Service Long runtime and weather-minded construction for outdoor work.

Teams that depend on cordless gear need three things: real power, quick charging, and durability. The FORGE HD12.0 delivers on all three. Compared to the HIGH OUTPUT HD12.0, it delivers 50% more power so big tools don’t stall when the cut binds. Between tasks, drop it on the M18 Dual Bay Simultaneous Super Charger and hit 80% in about 35 minutes; with COOL-CYCLE active cooling, packs return to service quickly on hot days or after heavy cuts. A reinforced venting path and patented ingress coating help protect internal components while the solvent-resistant housing shrugs off shop fluids. REDLINK monitors temperature and current to prevent overload, giving crews consistent output without babying the pack. For users who want the strongest, fastest-charging, longest-life option on M18, FORGE is the clear upgrade that keeps tools productive and schedules on track.

Milwaukee 48-11-1813X M18 REDLITHIUM FORGE HD12.0 High Output Battery Pack Features

• 50% More Power vs HIGH OUTPUT™ HD12.0
• COOL-CYCLE™ Active Cooling System provides high-speed cooling for less downtime with COOL-CYCLE™ capable chargers
• 35min Supercharge to 80% with the M18™ Dual Bay Simultaneous Super Charger
• Longest life for the most recharges and best performance over the life of the pack
• REDLITHIUM™ FORGE™ provides the most powerful, fastest charging, and longest life batteries within REDLITHIUM™
• Fully compatible with the M18™ system, featuring 250+ tools
• Patented ingress coating provides increased protection to maximize active cooling through an upgraded venting design
• Best protection from jobsite, weather and environmental conditions
• PWR Level 5 on the REDLITHIUM™ Power scale
• Resistant housing designed to provide increased protection against exposure to common oils, greases, and solvents
• REDLINK™ Intelligence: Our battery circuitry provides optimized performance and overload protection using total system communication between tool, battery and charger
• Enhanced onboard fuel gauge with improved readability in direct sunlight
• 3-year battery warranty
• Includes (1)M18™ REDLITHIUM™ FORGE™ HD12.0 Battery

Milwaukee 48-11-1813X M18 REDLITHIUM FORGE HD12.0 High Output Battery Pack Includes

• (1) M18™ REDLITHIUM™ FORGE™ HD12.0 Battery Pack (48-11-1813X)

Milwaukee 48-11-1813X M18 REDLITHIUM FORGE HD12.0 High Output Battery Pack Specifications

• Battery Platform: M18
• Voltage: 18V
• Capacity: 12.0Ah
• Cooling: COOL-CYCLE™ capable (with compatible chargers)
• Charge Speed: ~35 min to 80% on M18 Dual Bay Simultaneous Super Charger
• Electronics: REDLINK™ overload protection and performance management
• Housing: Chemical-resistant; upgraded venting with patented ingress coating
• Onboard Gauge: Enhanced LED fuel gauge
• Dimensions (L × W × H): 6.89″ × 3.35″ × 7.87″
• Weight: 3.4 lb
• Compatibility: 250+ M18 tools
• UPC: 045242798025
• Manufacturers Part #: 48-11-1813X
• Former Model: 48-11-1813

Milwaukee 48-11-1813X M18 REDLITHIUM FORGE HD12.0 High Output Battery Pack Warranty

• Milwaukee’s 3 Year Limited Warranty

Why Professionals Choose the Milwaukee M18™ REDLITHIUM™ FORGE™ HD12.0 Battery Pack

Pros choose FORGE because it unlocks more performance from M18 tools while cutting wait time on the charger. The 12.0Ah pack combines long runtime with 50% more power than the HIGH OUTPUT HD12.0, so ripping, grinding, and drilling stay on pace. On large crews, COOL-CYCLE active cooling plus 35-minute supercharging to 80% keeps rotations tight. The REDLINK electronics protect the pack and tool during heavy loads, and the rugged housing tolerates oils and site conditions. For users who want the strongest, fastest-charging, longest-lasting M18 battery, the 48-11-1813X FORGE HD12.0 is the pack that keeps production moving.