Extended Life Battery for The Garmin Nuvi 300T — NewPower99.com
Garmin nuvi 300 (discontinued) car sat nav with 3.5-inch screen and preloaded UK and Ireland mapping
TRAMsoft - GARMIN Nüvi 300 Series (english)
Garmin Nuvi 300/350 Personal Travel Assistant Gps, Chords Case & Manual Included | eBay
Amazon.com: Gomadic Hot Sync and Charge Straight USB Cable for The Garmin Nuvi 300 300T – Charge and Data Sync with The Same Cable. Built TipExchange Technology : Electronics