M12 and M18 packs serve different tool systems. Milwaukee’s 48-59-1812 charger supports both systems sequentially; this charging feature does not merge the tool platforms.
At a glance
| Question | M12 | M18 |
|---|---|---|
| Battery system | M12 | M18 |
| Example charger | 48-59-1812 accepts M12 | 48-59-1812 accepts M18 |
| Example tool here | No M12 model in verified catalog | 2953-20 M18 impact driver |
Why the distinction matters
M12 and M18 packs serve different tool systems. Milwaukee’s 48-59-1812 charger supports both systems sequentially; this charging feature does not merge the tool platforms.
Use the manufacturer approval for the exact battery, tool and charger. A common voltage number or a shared manufacturer name is insufficient when the systems have different receivers or electronics.
Explore each platform
Before you use a specific pair
Read the physical product labels, the region and type/revision, and the latest manufacturer manual. Where this catalog lacks model-level evidence, the check result remains unknown.
Official sources
These source records were reviewed as of 2026-10-30; access methods differ. Open the latest manufacturer manual for your exact type, region and revision before use.
- Milwaukee Tool — 48-59-1812 product page48-59-1812 accepts M12 and M18 batteries sequentially · curated_primary · Checked 2026-10-30
- Milwaukee Tool — 2953-20 product page2953-20 M18 tool and all M18 batteries · curated_primary · Checked 2026-10-30