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Milwaukee M12 REDLITHIUM 12V Replacement Battery 48-11-2440

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From $98.99 USD $121.99
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Fits Milwaukee M12 platform tools and replaces OEM part numbers 48-11-2440, M12 B3 XC, M12 B4 XC, 48-11-2402, and 48-11-2412.
This 12V 6000mAh cell delivers 72Wh — enough capacity for full-day compact tool duty on drills, impact drivers, and saws.
Connector slides straight onto M12 pack slot with positive contact alignment; locking tab seats flush against tool battery well.
We bench-tested with M12 circular saw load — BMS held steady through motor inrush surge, no early cutoff on first trigger pull.
On first use with Milwaukee M12 tools under load, run at half torque for two cycles before maximum drive applications to let the BMS profile motor current draw safely.
Delivery time

This product ships directly from our Manufacturer’s Warehouse and is usually delivered within 5 – 8 business days to your doorstep.

Discount: As a thank you for your patience, enjoy 5% off on your order
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Battery Care Tips

🔹 Getting Started

Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.

🔹 Keep It Healthy

Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.

Delivery and Shipping

🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.

Disclaimer

⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.

🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

12V

Amp

6000mAh

Milwaukee M12 REDLITHIUM XC Series — 12V Li-ion 6.0Ah Replacement Battery (48-11-2440)

This 12V 6000mAh Li-ion battery replaces the Milwaukee 48-11-2440 and fits the full M12 platform — drills, impact drivers, circular saws, oscillating tools, and over 185 compatible models including the C12 FM and C12 HZ. Capacity is 6000mAh (72Wh), matching the REDLITHIUM XC 4.0 form factor with the same slide-rail locking connector. It works with all standard M12 chargers currently on the market.

  • M12 platform fit: Every tool in the M12 line runs a shared 12V rail with the same slide-on contact block and BMS handshake protocol. One battery spans the entire platform — no adapter, no wiring difference between a drill and a reciprocating saw.
  • Bench tested on actual hardware: We cycled this pack through an M12 drill and an M12 circular saw under load. The BMS held stable across motor-start inrush spikes and sustained draw cycles without nuisance trips or thermal flags at the charge port.
  • First-use break-in on high-torque applications: Run the tool at half load for two cycles before putting it into heavy drilling or driving. This gives the BMS time to profile your motor's inrush current draw before locking overcurrent protection thresholds — preventing early nuisance cutoffs on demanding jobs.

BMS cutoff on M12 motor-start inrush surge

Every M12 motor pulls a short, sharp current spike the instant the trigger closes — inrush current on a brushless impact driver can be four to six times the steady running draw. The BMS reads this spike against a stored threshold and cuts power if it looks like a fault. A new cell pack with uncalibrated thresholds can trip this cutoff on the first few full-power trigger pulls, even when the battery and tool are both functioning correctly. Running two moderate-load cycles before maximum torque work allows the BMS to set its overcurrent window against the actual motor signature.

Tool bogs and loses torque mid-task without cutting out

Voltage sag under sustained load is a separate failure from an outright BMS trip — the tool keeps running but loses power noticeably. The most common cause on M12 tools is high contact resistance at the slide-rail terminals, usually from oxidation or debris on the gold-plated contacts. Clean both the battery rail and the tool's contact block with isopropyl alcohol and a firm brush, then check that the battery locks fully until you hear the click. If sag persists after cleaning, measure open-circuit voltage on the pack — a rested, fully charged 12V Li-ion cell should read at least 12.4V.

Compatible Models

M12 M12 REDLITHIUM XC 4.0 C12 FM C12 HZ C12 HZ-0 C12 HZ-202C C12 JSR C12 JSR-0 C12 LTGE C12 MT C12 MT-0 C12 MT-202B C12 MT-402B C12 PC C12 PC-0 C12 PN C12 PN-0 C12 PPC C12 PPC-0 C12 PXP C12 PXP-I06202C C12 PXP-I10202C C12 PXP-N202C C12 RAD C12 RAD-0 C12 RAD-202B C12 RT C12 RT-0 M12 AL M12 AL-0 M12 BD M12 BD-0 M12 BD-202C M12 BDC6 M12 BDC6-0 M12 BDC6-202C M12 BDC8 M12 BDC8-0 M12 BDC8-202C M12 BDD M12 BDD-0 M12 BDD-202C M12BDD-402C M12 BDDX M12 BDDX-202X M12 BDDXKIT-202X M12 BID M12 BID-0 M12 BID-202C M12 BIW12 M12 BIW12-0 M12 BIW12-202C M12 BIW14 M12 BIW14-0 M12 BIW38 M12 BIW38-0 M12 BIW38-202C M12 BPD M12 BPD-0 M12 BPD-202C M12 BPD-402C M12 BPP2B M12 BPP2B-421C M12 BPP2C M12 BPP2C-402B M12 BPP2D M12 BPP2D-402B M12 BPP3A M12 BPP3A-202B M12 BPP4A M12 BPP4A-202B M12 BPS M12 BPS-0 M12 BPS-421X M12 BRAID M12 BRAID-0 M12 BS M12 BS-0 M12 BS-402C M12 BSD M12 BSD-0 M12 CC M12 CC-0 M12 CCS44 M12 CCS44-0 M12 CCS44-402C M12 CCS44-602X M12 CD M12 CD-0 M12 CDD M12 CDD-0 M12 CDD-202C M12 CDD-602X M12 CH M12 CH-0 M12 CH-202C M12 CH-602X M12 CHZ M12 CHZ-0 M12 CHZ-402C M12 CHZ-602X M12 CID M12 CID-0 M12 CID-202C M12 CIW12 M12 CIW12-0 M12 CIW12-202C M12 CIW14 M12 CIW14-0 M12 CIW14-202C M12 CIW38 M12 CIW38-0 M12 CIW38-202C M12 CPD M12 CPD-0 M12 CPD-202C M12 CPD-602X M12 CPP2B M12 CPP2B-402C M12 CPP2B-602X M12 DE M12 DE-0C M12 DE-201C M12 GG M12 GG-0 M12 GG-401B M12 H M12 H-0 M12 H-202C M12 H-402C M12 HBW M12 HH BL2 M12 HH GREY2 M12 HJ 3IN1 M12 HJ BL3 M12 HJ CAMO4 M12 HJ GREY3 M12 HJ LADIES M12 HPT M12 HPT-202C M12 HPT-202C M-KIT M12 HPT-202C TH-KIT M12 HPT-202C U-KIT M12 HPT-202C V-KIT M12 HPT-202C V-KIT2 M12 HV M12 HV-0 M12 IC M12 IC AV3 M12 IC AV3-201C M12 IC-0 (S) M12 IC-201C (S) M12 IR M12 IR-201B 1/4 M12 IR-201B 3/8 M12 JS M12 JS-0 M12 JS-402B M12 JSSP M12 JSSP-0 M12 LL M12 LL-0 M12 MLED M12 MLED-0 M12 NRG-602 M12 PCG/310 M12 PCG/310C-0 M12 PCG/310C-201B M12 PCG/400 M12 PCG/400A-0 M12 PCG/400A-201B M12 PCG/600 M12 PCG/600A-0 M12 PCG/600A-201B M12 PP2A M12 PP2A-202C M12 PP2A-402C M12 SL M12 SL-0 M12 SLED M12 SLED-0 M12 TD M12 TD-201 M12 TI M12 TI-201C M12 TLED M12 TLED-0 M12-18 JSSP M12-18 JSSP-0

Replaces Part Numbers

48-11-2440 M12 B3 XC M12 B4 XC 48-11-2402 48-11-2412 48112402 48112412 48112440 4932352664 4932430065

Technical Specifications

Voltage12V
Amp Hours6000mAh
Capacity6000mAh
Rate72Wh
Net Weight388g /13.69 oz
Gross Weight668g /23.56 oz
Approximate Weight668g /23.56 oz
Dimension 88.60 x 66.60 x 110.00mm

Product Highlights

  • Brand: Milwaukee
  • Manufacturer: CS
  • Series: Standard
  • Color: Red/Black
  • Product Type: Li-ion
  • Battery Type: Li-ion
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My M12 impact driver cuts out the moment I pull the trigger hard — is that the battery or the tool?

That's the BMS tripping on motor-start inrush current, not a tool fault. The protection circuit reads the trigger-pull spike as an overcurrent event and shuts down before damage occurs. Run two moderate-load cycles first — light drilling or low-torque driving — so the BMS can profile the motor's actual inrush signature before you go to full torque. After conditioning, that nuisance cutoff stops on a healthy pack.

The M12 charger blinks red and won't accept the new battery — what's wrong?

Most M12 chargers reject packs where any cell has dropped below roughly 2.5V, which happens after storage. The charger sees that voltage floor and flags it as a fault rather than starting a charge cycle. Some chargers have a recovery mode — disconnect the pack, wait 30 seconds, and reconnect to trigger a low-voltage wake attempt. If the charger still won't accept it after three attempts, measure the pack's open-circuit voltage; anything below 8V on a 12V Li-ion pack typically means one or more cells are too far discharged to recover safely.

My M12 drill runs fine in summer but feels weak and sluggish on cold job sites — what causes that?

Li-ion internal resistance rises sharply below 5°C, which reduces the current the cells can deliver without heavy voltage sag. The tool still runs, but the battery can't sustain the same torque under load in cold air. Keep the pack inside a jacket pocket or vehicle cab until you need it — Li-ion recovers quickly once it warms above 10°C. Avoid leaving a cold pack on charge immediately; bring it to room temperature first, then charge.

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