In case anyone didn't know: If your Milwaukee batteries overheat you can put them in the customer's freezer for a minute. Just don't ask the customer first, cuz that'd be weird. :
Amazon.com: CHAUNVEN 18V 6.0Ah M18 Battery Replacement for All Milwaukee M18 Battery 48-11-1850 48-11-1820 48-11-1840 M18 M18B XC Cordless Power Tools 18V Lithium Battery 2 Pack : Tools & Home Improvement
Milwaukee M18 Portable Power Source, Model# 49-24-2371 | Northern Tool
Milwaukee M18 High Demand 9.0 AH Battery Performance Testing & Review in 4K - YouTube
Milwaukee M18 REDLITHIUM HIGH OUTPUT XC 6.0Ah Battery Pack (2pk) 48-11-1862 from Milwaukee - Acme Tools
Amazon.com: 2-Pack Replacement for Battery Milwaukee 3-in-1 Heated Jacket (251B-20) - Compatible with Milwaukee 48-11-2401, 48-11-2402, M12 Battery (12V, Lithium-Ion, 1500mAh) : Tools & Home Improvement
M18 REDLITHIUM High Output HD12.0 Battery Pack by Milwaukee at Fleet Farm
How to store Milwaukee batteries: top 4 ways & helpful guide
Milwaukee M18 REDLITHIUM HIGH OUTPUT HD12.0 Battery Pack 48-11-1812 - Triple "R" Truck Parts