We tested with batteries and found the following.
Olympus OM-D E-M10 Digital Body - FAULTY + battery nothing else
Olympus PEN Mini E-PM1 Mirrorless Camera Body - Silver - Faulty / Spares
Olympus OM-D E-M10 camera Body Only FAULTY SPARES OR REPAIR
Olympus OM-1N Film Camera Body - FAULTY - Spares or Repair
Olympus PEN E-PL8 17.2MP Mirrorless Camera - (Body Only) - Faulty
Faulty Olympus E-PL2 Camera Body - Faulty IS and Internal Date Battery