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: Case Cover Compatible with Garmin eTrex 30 20 10, Made in The USA by GizzMoVest LLC COF. : Electronics
Amazon.com: Gomadic Hot Sync and Charge Straight USB Cable for The Garmin etrex 10 20 30 – Charge and Data Sync with The Same Cable. Built TipExchange Technology : Electronics