The short answer is, Maybe. Any wet cell battery will be damaged if left completely discharged for even a short period of time.
You won't know unless you have them re-charged and tested.
2011 351RLTS Eagle, Mor/Ryde suspension & pin box
06 F350 Lariat PSD, SRW, LB, CC, EGR delete kit, 16K DrawTite hitch, Timbrens, TST TPMS
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