Garmin etrex 30x handheld GPS review – The Field Biologist
Garmin eTrex 30x GPS Navigator
ETREX GPS SERIES - Liberty Mountain
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