This looks like a new one on me. Where did you get the model name from? Have long have you had it? What else do you know about its history? Do you have any more pics you can share? I'm particularly interested in seeing the back of the headstock and the body.
The "H" in the model name would mean this was a spot model made for Ikebe Gakki in Japan. It looks like it's essentially an RG15271 with EMGs.
MATERIAL MAPLE/WENGE 5PCS.
THICKNESS(mm) 19.0*21.0 AT 1F*12F
WIDTH(mm) 48.0*68.0 AT 0F*24F
SCALE(mm/inch) 648 / 25.5
FRET WIRE SBB215-175/(It is the same as jumbo size of the use in PRESTIGE RG.)
POSITION INLAY ACRYL WHITE PEARL DOT 4.0mmDIA.
SIDE DOT INLAY WHITE DOT 1.5mmDIA.
BRIDGE CAVITY GOTOH GTC107
STD.CATEGORY SOLID FLAT FINISH
NECK BACK NATURAL MATTE
I was answered from Japan about this model, people associated with this series. And I was waiting for this answer. And the battery, In my case, this is where all the main electronics is under a big cover.