JUPITER-Xm: What type of batteries can be used? January 26, 2022 02:24 Updated Follow Use nickel-metal hydride batteries (eight AA batteries). NOTE: Zinc-carbon batteries or alkaline batteries cannot be used. Related articles JUPITER-Xm: How many hours can I continue to use the unit on battery power? JUPITER-Xm: Can I charge the Jupiter-Xm while rechargeable Ni-MH batteries are installed? JUPITER-X, JUPITER-Xm: Can the internal speaker be turned off at all times? JUPITER-X JUPITER-Xm: How to turn the ARPEGGIO ON or OFF for a specific part JUPITER-X: Downloading Sound Packs / Wave Expansions / Model Expansion