37 Aluminum-based battery services, namely, repair, maintenance, recharging, refueling, and replacement of aluminum-based batteries used for electricity generation; aluminum-air battery services, namely, repair, maintenance, recharging, refueling, and replacement of aluminum-air batteries used for electricity generation; galvanic battery services, namely, repair, maintenance, recharging, refueling, and replacement of galvanic batteries used for electricity generation; generator services, namely, repair, maintenance, recharging, refueling, and replacement of electric generators; aluminum-based generator services, namely, repair, maintenance, recharging, recharging, refueling, and replacement of aluminum-based electric generators; aluminum-air generator services, namely, repair, maintenance, recharging, refueling, and replacement of aluminum-air electric generators; galvanic generator services, namely, repair, maintenance, recharging, refueling, and replacement of galvanic generators; generator services for generators using aluminum-based battery, namely, repair, maintenance, recharging, refueling and replacement of generators using aluminum-based batteries; generator services for generators using aluminum-air batteries, namely, repair, maintenance, recharging, refueling, and replacement of generators using aluminum-air batteries; generator services for generators using galvanic batteries, namely, repair, maintenance, refueling recharging, and replacement of generators using galvanic batteries