What is the difference between M18-48-11-1850 battery & M18-48-11-1852 battery?

I believe the one ending in “2” is a two pack of batteries. Other than that not sure. A tip for you/ only buy batteries that are Milwaukee brand- there’s lots of imitators and from what I read about them the quality is very suspect.

What is the manufactured date of the batteries as I have bought them before thinking they were brand new and they failed a month later past warranty?

Make sure you buy OEM not aftermarket as I have had a similar problem with nonmilwaukee batteries. All of my Milwaukee batteries have lasted for years. If they set a long time between usages it will shorten the life of the battery.

Does this specific battery offer 21,700 cells?

I think it has 5 x 18650 cells in them 18V 5.0ah

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Milwaukee 48-11-1852 M18 REDLITHIUM XC 5 Ah Lithium-Ion Extended Capacity Battery (2-Pack)

Product ID: 456466425

Details

Battery capacity
5
Battery cell composition
Lithium Ion
Brand
Milwaukee
Number of batteries
2 Lithium Ion
Recommended uses for product
Power Tool

⏳2.5x longer runtime

⚡20% more power output

🔋18V high-voltage power

Description

🔋 Power through your projects with unstoppable energy!

DOUBLE THE VALUE - Two-pack ensures you never run out of juice
RUGGED DURABILITY - Built to endure tough jobsite conditions
UNMATCHED POWER BOOST - Experience 20% more power for demanding jobs
EXTENDED RUNTIME MASTERY - Work 2.5x longer without downtime
UNIVERSAL M 18 COMPATIBILITY - Seamlessly powers 60+ Milwaukee cordless tools

The Milwaukee 48-11-1852 M18 REDLITHIUM XC 5 Ah battery 2-pack delivers industry-leading 18V power with 20% more output and 2.5 times longer runtime, compatible with over 60 M18 cordless tools. Designed for durability and extended use, this battery set is a must-have for professionals demanding reliable, long-lasting performance on every job.

Specifications

ASIN	B09NNHN8S8
Amperage	5 Amps
Antenna Location	Power Tool
Battery Capacity	5
Battery Cell Type	Lithium Ion
Battery Weight	1.8 Pounds
Best Sellers Rank	#133,272 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #3,076 in Outdoor Power & Lawn Equipment
Brand	Milwaukee
Compatible Phone Models	milwaukee 18v cordless tools
Customer Reviews	4.7 4.7 out of 5 stars (3,179)
Global Trade Identification Number	00724994291977
Item Dimensions	12.7 x 7.6 x 15.2 centimeters
Item Weight	1.54 kg
Manufacturer	Milwaukee
Model Name	M18™ REDLITHIUM™ XC5.0
Model Number	M18 48 111850
Number of Batteries	2 Lithium Ion batteries required.
Reusability	Single Use
UPC	724994291977 045242350506
Unit Count	2 Count
Voltage	18 Volts

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