Congrats !!!!
According to everything I read those Lithium Iron Phosphate batteries used in cars and motorcycles are hazardous.
Here is an MSDS for Lithium Iron Phosphate Rechargeable Batteries (LiFePo4):
http://www.batteryspace.com/prod-specs/MSDS%20LFP%20NDGR%20UN3480.pdf
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[FONT=Verdana,Bold] "Section 13 - Disposal Considerations
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[FONT=Verdana,Bold] APPROPRIATE METHOD OF DISPOSAL OF SUBSTANCE ORPREPARATION
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If batteries are still fully charged or only partially discharged, they can be considered a reactive hazardous waste because of significant amount of unreacted, or unconsumed lithium remaining in thespent battery. The batteries must be neutralized through an approved secondary treatment facility prior to disposal as a hazardous waste. Recycling of battery can be done in authorized facility, through licensed waste carrier."
I just looked at my companies policy for dealing with lithium batteries. This is for disposal.
Place MISC Dangerous Goods (Class 9) Label on Container
Battery terminals must be protected and packaged in a manner to prevent contact between terminals.
• Lithium must be shipped in a UN rated poly or metal drum.
• Lithium batteries can NOT be mixed with other batteries in the same containers.
• Lithium batteries MUST be kept dry.
• Place proper label/sticker/markings on DOT container.
• Mark start date on DOT container when first battery is place in container.
• Place DOT container in pallet box/utility box/drum rack.
NOTE: Prepare batteries per DOT 49 CFR.
So....they arent considered "Hazardous" but they are considered "dangerous" per 49CFR. That is the code of federal regulations for transporting and shipping of materials. But to show you how the government thinks....Gasoline, Diesel, Jet fuel, are dangerous...not hazardous....but aerosol cans are considered hazardous.