LFM vs LFX - What's the difference?

SHORAI LFM Lithium-Iron Powersports battery w/BMS, 4.0Ah 13.2V, "L" polarity, Case Type 2 Length 4.45" Width 2.28" Height 3.50" Shorai Batteries require a charging system output of 13.1 Volts or higher at idle, and must not exceed 15.2 volts at maximum output.

 - NOTE - Some recent 14 series batteries were labeled with an incorrect CCA rating.  ALL 14 series LFM batteries have a CCA of 210. The exception being the LFM14L2-LC12 is rated at 40CCA. 

Case size #2, 113mm length, 58MM Width, 89MM Height

Specifications and Dimensions

Part +	Voltage Pb Eq	Polarity	A/HR	CCA (A)	Weight (KG)	Weight (LBS)	Max Charge Rate (A)
LFM14L2-BS12	12V		4.0	210	0.763	1.68	14