Amazon.com : Wasabi Power Battery (2-Pack) and Charger for Garmin 010-11654-03 and Garmin Alpha, Montana 600, Montana 600t, Montana 650, Montana 650t, Monterra, VIRB, VIRB Elite : Electronics
Amazon.com: Gomadic Portable AA Battery Pack Designed for The Garmin Monterra - Powered by 4 X AA Batteries to Provide Emergency Charge. Built Using TipExchange Technology : Electronics