Mooch - I just noticed that Tesiyi lists the "40A" 2600mAh battery I tested as a LiMn "IMR" battery on their web site... http://www.tesiyibattery.com/products/tesiyi-40a-2600mah-battery-2/ The ones I tested had "ICR" on the
TESIYI Inteli Charger E2S Review + The T2 & T4 Mini Power Bank Tested
Authentic Tesiyi T4 White 4-Slot Smart Digital Charger for 18650