With a Milwaukee M18 REDLITHIUM™ 4.0Ah battery, you'll get up to 2.5x more run time, up to 20% more power and up to 2x more battery life compared with previous li-ion models.
Its durable metal frame and rubber overmold work alongside shock responsive separators to provide extra protection against vibrations, bumps and drops - this increases its toughness and helps to prevent pack failure. Individual cell monitoring ensures optimal charge and discharge to maximise the battery's lifespan, while an on-board gauge keeps you fully informed of its state of charge.
This powerful and high-performance battery pack is compatible with all Milwaukee M18™ cordless power tools - it will keep you working for even longer between charges or pack swaps, reduce your downtime and get the job done quicker.
• More run-time, extra power and longer battery life
• Individual cell monitoring ensures optimal charge and discharge
• Durable internal metal frame and rubber overmold
• Robust design prevents pack failure from excessive vibrations or drops
• On-board battery fuel gauge for maximum efficiency
• Compatible with all Milwaukee M18™ cordless power tools

Other Milwaukee M18™ Batteries & Chargers
• Milwaukee M18 REDLITHIUM™ 5.0Ah (code 31200)
• Milwaukee M18 REDLITHIUM™ 5.5Ah High Output (code 20939)
• Milwaukee M12-M18™ Fast Charger (code 18266)
• Milwaukee M18™ Multi Bay Charger (code 79644)

Delivery (UK mainland only)

 

Next Day: £5, or FREE over £40

- Order by 9pm Mon-Thu: next working day

- Order Fri to 5pm Sun: Monday

- Order after 5pm Sun: Tuesday

 

Pre-12pm: £10

- Same cut-offs as Next Day above

 

Saturday & Sunday: £10, or £5 over £40, or FREE over £75

- Saturday: order by 6pm Fri

- Sunday: order by 4pm Sat

 

Heavy items (over 30kg)

- Mon-Fri only. Order by 6pm and allow up to two working days

- Order after 6pm Thu: arrives after the weekend

 

Supplier items

- Sent directly by the supplier, so timings vary. Lead times appear on the product page in working days (Mon-Fri)

 

More about delivery 

Next Business Day Collection (eligible items)

- Order by 9pm Mon-Thu: collect next day

- Order after 9pm Thu to 5pm Sun: collect Monday

- Heavy items (over 30kg): allow up to two working days

 

Opening hours

- Weekdays vary by branch: open 6:30am-7am, close 6pm-8pm

- Saturday: 7am-6pm

- Sunday: 9am-4pm

 

Check your local store's hours and that it's open before visiting. Please wait for our text or email before collecting.

 

Holding your order
We'll hold it for 14 days, then automatically refund your original payment method.