Batteries and chargers / Milwaukee M18
BATTERYMilwaukee M18

Milwaukee 48-11-1840 M18 battery

48-11-1840 is a single M18 4.0Ah pack.

Published manufacturer specifications; sources last checked 2026-10-25.

Specifications

Voltage
What this means

Voltage identifies the battery platform. Some makers quote a peak (max) figure at the start of discharge while others quote nominal, so 18 V nominal and 20 V max packs usually have the same cell count. Higher-voltage platforms typically serve more demanding tools. Batteries only fit tools from the matching line.

18 V (M18 system)
Battery capacity (each)
What this means

Amp-hours (Ah) is the battery's charge capacity. At the same voltage, a higher Ah pack runs longer between charges but is usually larger and heavier. Smaller packs keep the tool lighter for overhead and light work; larger packs suit saws, grinders and other high-draw tools.

4.0 Ah
Battery weight
What this means

Battery weight is the pack on its own, as listed by the maker. Add it to the tool-only weight to estimate the working weight. Higher-capacity packs add weight, which you will notice in overhead and all-day work.

1.7 lb
Charge indicator
What this means

A charge indicator shows remaining charge, usually as a row of LEDs on the pack or charger. It is a rough guide, not an exact percentage, and readings can shift once the battery rests or cools. Some chargers also show fault or temperature status.

Yes
Battery line
What this means

Battery line is the maker's platform name, which determines which tools and chargers the pack fits. Makers generally keep one battery design across a platform, but batteries from different makers are not interchangeable. Buying into a line is often a longer-term choice than buying a single tool.

REDLITHIUM
Warranty
What this means

This is the maker's published warranty term. Terms for tools, batteries and chargers often differ, and some depend on registration or exclude certain uses. Read the maker's terms for what is covered, how claims are handled and whether proof of purchase is required.

3 Year Limited Warranty
Charger in box
What this means

This states whether a charger is included and which type. Chargers vary in output, so the same battery can take noticeably different times to charge on different chargers. Tool-only listings usually include no charger.

No
Recharge time, standard charger76 min
Recharge time, rapid charger48 min
Recharge time, super charger48 min
Dimensions (L x W x H)6.7 x 6.65 x 3.25 in

Compare this model with another tool.

Buying options

Find 48-11-1840 prices on Amazon Find 48-11-1840 prices at eBay New tab, US retailers. Search results open where no exact listing is on file. Check the listing says 48-11-1840; marketplace sellers vary.

What is in the box with the 48-11-1840?

The battery itself. Milwaukee's page does not list box contents.

Part of the Milwaukee M18 system. See "Works with" for the maker's own compatibility statement.

Model number 48-11-1840 (also searched without hyphens as 48 11 1840).

Quick answers

Which tools does the 48-11-1840 fit?
It is a Milwaukee M18 system battery. Which batteries fit Milwaukee M18 tools?
What voltage is the 48-11-1840?
18 V (M18 system), as Milwaukee publishes it.
How many Ah is the 48-11-1840?
4.0 Ah per battery, as Milwaukee publishes it.
Which chargers charge the 48-11-1840?
Chargers whose maker statement covers Milwaukee M18 batteries: 48-59-1812, 48-59-1802, 48-59-1808, 48-59-1815. Each statement is linked under Chargers for this battery.
Does the 48-11-1840 come with a charger?
No. Milwaukee lists no charger in the box.
What is the 48-11-1840 warranty?
3 Year Limited Warranty, as Milwaukee publishes it.

Ranked lists that include this battery

Chargers for this battery

Chargers whose maker statement covers Milwaukee M18 batteries, each with the statement's source.

Which batteries fit which tools, in Milwaukee's own words: Milwaukee M18 battery compatibility.

Tools we cover that run on Milwaukee M18

Every Milwaukee M18 tool takes this system's batteries; capacity (Ah) changes run time, not fit.

Owner reviews

Read the owner reviews on MilwaukeeTool.com

Sources

  1. Milwaukee US product page 48-11-1840, retrieved 2026-10-25

Spotted a wrong number? Report a spec error (opens an email with the model filled in). We re-check against the maker's page and correct the page.