The Milwaukee 48-59-1808 is Milwaukee’s M18 & M12 Multi-Voltage Sequential Charger — the most commonly bundled charger in Milwaukee M18 combo kits. Despite having two ports, it charges batteries sequentially (one at a time), but crucially it accepts both M18 and M12 batteries in the same unit, making it the go-to choice for tradies who use both platforms. It is compatible with all Milwaukee M18 and M12 REDLITHIUM batteries.
48-59-1808 Specifications
| Specification | Value |
|---|---|
| Part Number | 48-59-1808 |
| Compatible Platforms | Milwaukee M18 and M12 |
| Ports | 2 (one M18, one M12 — sequential charging) |
| Charging Mode | Sequential — charges one battery at a time |
| Input | AC 110–120V, 60 Hz |
| Charge Time — M12 (2.0Ah) | approx. 30 min |
| Charge Time — M18 2.0Ah (CP) | approx. 30 min |
| Charge Time — M18 5.0Ah (XC) | approx. 60 min |
| Charge Time — M18 6.0Ah (HO) | approx. 75 min |
| LED Indicators | Yes — per port, red/green charge status |
| REDLINK Intelligence | Yes — communicates with battery for optimised charging |
| Weight | approx. 390 g / 0.86 lbs |
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Battery Compatibility
The 48-59-1808 charges all batteries in the Milwaukee M18 platform and all batteries in the Milwaukee M12 platform. Both M18 and M12 REDLITHIUM battery generations (CP, XC, HO, FORGE) are fully supported.
| Battery Model | Platform | Capacity | Approx. Charge Time |
|---|---|---|---|
| 48-11-2401 | M12 | 2.0 Ah | approx. 30 min |
| 48-11-2440 | M12 | 4.0 Ah | approx. 60 min |
| 48-11-1820 | M18 | 2.0 Ah (CP) | approx. 30 min |
| 48-11-1840 | M18 | 4.0 Ah (XC) | approx. 55 min |
| 48-11-1850 | M18 | 5.0 Ah (XC) | approx. 60 min |
| 48-11-1860 | M18 | 6.0 Ah (HO) | approx. 75 min |
| 48-11-1862 (FORGE) | M18 | 6.0 Ah (FORGE) | approx. 75 min |
Sequential vs Simultaneous — What Does It Mean?
The 48-59-1808 has two battery ports but charges batteries one at a time (sequentially). If you insert two batteries, the charger will complete the first battery fully before moving to the second. This means total charge time for two batteries is doubled compared to what simultaneous charging would achieve. Milwaukee’s 48-59-1812 Rapid Charger is a single-port M18-only charger but with faster charge times and no sequential delay.
Does the 48-59-1808 Charge Both M18 and M12?
Yes — this is the key selling point of the 48-59-1808. The left port accepts M18 batteries; the right port accepts M12 batteries. Both use REDLINK Intelligence to communicate with the battery pack. It will not charge Makita or DeWalt batteries, and the M18 and M12 ports are not interchangeable.
Specifications reflect standard production variants. Always verify compatibility with your specific battery model before purchase. For the most current product information, visit the manufacturer’s official website.