Amazon.com: Gomadic Portable AA Battery Pack Designed for The Garmin etrex 10 20 30 - Powered by 4 X AA Batteries to Provide Emergency Charge. Built Using TipExchange Technology : Electronics
Amazon.com: Hard Carrying Case Replacement for Garmin eTrex 20/20x/30x/22x/32x Handheld GPS by Aenllosi (Black Zipper) : Electronics
Amazon.com: kwmobile Case Compatible with Garmin eTrex 10/20/30/201x/209x/309x - GPS Handset Navigation System Soft Silicone Skin Protective Cover - Black : Electronics
Amazon.com: Ramtech Adjustable Bike GPS Handlebar Cart Mount for Bicycle, Compatible with Garmin eTrex 10 20 20x 20xt 22x 30 30x 32x / eTrex Touch 25 35 35t Handheld GPS, BHMS : Electronics