What am I looking at? PS-1 replacement

An engine I am considering purchasing was originally a PS-1 railking articulated steamer.  Seller says they went to change the battery but found this instead.  I don't recognize the boards, and there is no place for a battery.  Is this a ps-3 upgrade?  Perhaps something else entirely?

5-16-2018 12-06-40 PM5-16-2018 12-07-34 PM

thanks in advance,

John Z.

May God Bless us all.

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It appears to be a TAS TMCC setup.  I believe it's the SAW board as I don't see the bridge clamped to the heatsink that would be there with EOB.  It also has the same side profile as the TAS SAW board I'm looking at from my parts box.

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