Li-Ion-battery - 1800mAh (3.7V) - for GPS, navigation system, sat, nav Garmin Monterra - Electropapa
Amazon.com: Garmin Montana 700, Rugged GPS Handheld, Routable Mapping for Roads and Trails, Glove-Friendly 5'' Color Touchscreen & 0101165407 Handlebar Mount for Montana/Monterra : Electronics
USA Gear Handheld GPS Case Holster for Garmin Approach G6, eTrex 20x, eTrex 30x, Oregon 650, Monterra Wi-Fi and More with Belt Loop, Carabiner Clip and Scratch-Resistant Neoprene (B00DGZQELK) | Amazon price