As an Amazon Associate I earn from qualifying purchases.Updated: March 27, 2026
The Battery M18 powers your Milwaukee M18 Drill, enabling it to function. Like all rechargeable batteries, its performance degrades over time. Noticeable decreases in runtime or power output signal the need for a replacement. Delaying this can lead to reduced drilling efficiency and even potential damage to the drill motor.
Function: Provides cordless power to the Milwaukee M18 Drill, enabling drilling and driving tasks.
Signs it needs replacing: Reduced runtime, decreased power output, slow charging times, overheating.
OEM vs aftermarket: OEM batteries (Milwaukee brand) offer guaranteed compatibility and performance but are more expensive. Aftermarket alternatives are often cheaper but may vary in quality and lifespan. Always check reviews before purchasing.
Installation: Typically straightforward, involving removing the old battery pack and clicking in the new one.
Replacement schedule: every 2-4 years
Compatibility warning: always verify part number matches your exact model before ordering
Pros & Cons
Pros
✓ Restores device to original performance without buying a new unit
✓ Significantly cheaper than a full device replacement
✓ Multiple options available from OEM and aftermarket sellers
Cons
✗ OEM parts cost more than third-party alternatives
✗ Wrong part number will not fit — model verification is essential
Common Use Cases
Scheduled maintenance on the every 2-4 years replacement cycle
Performance restoration after noticing reduced output or efficiency
Preventive replacement before a worn part causes secondary damage
Who Should Buy This
This replacement battery is for Milwaukee M18 Drill (model 2606-20) owners experiencing reduced performance due to a worn-out battery. Replacing the battery extends the life of your existing drill.
Not ideal for: If your drill has other malfunctions beyond battery performance, a full device replacement may be more cost-effective.
Good to Know Before Buying
💡
Always confirm your exact model number (2606-20) before ordering. Part numbers vary between model variants and production years. Check the label on your device or original documentation to be sure.
Frequently Asked Questions
What is the part number for the Milwaukee M18 Drill Battery M18?
The part number is 48-11-1820. Always verify this matches your exact model (2606-20) before ordering, as similar models may use different parts.
How often should I replace the Battery M18 on my Milwaukee M18 Drill?
every 2-4 years
Will aftermarket Battery M18 replacements work in my Milwaukee M18 Drill?
Third-party parts are widely available and often cheaper than OEM. Look for listings that specifically mention compatibility with model 2606-20 and check buyer reviews for fit confirmation before purchasing.
Prices change frequently. See the latest deal on Amazon.