Cameron Sino 1250mAh Battery for Garmin Nuvi 300, 300T, 310, 310D, 310T, 350, 350T, 360, 360T, 370 - AliExpress
Garmin Nuvi 300 GPS Navigation System With UK Mapping (discontinued by manufacturer) : Amazon.co.uk: Electronics & Photo
3rd Generation Powerful Audio FM Transmitter with Car Charger suitable for the Garmin Nuvi 300 300T - Uses Gomadic TipExchange Technology
NEON 12V Vehicle Power Cable for Garmin GPS Nuvi 200/300/1200/1300 Series (010-10723-06)
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
How to Replace Your Garmin Nuvi 300 Battery - YouTube
RAM® Form-Fit Cradle for the Garmin nuvi 300, 310, 350, 360 & 370 – RAM Mounts
For Garmin Nuvi Cradle Mount Holder Adapter Clip For Nuvi 300 310 350 360 370 GPS - AliExpress
Garmin nuvi 300 (discontinued) car sat nav with 3.5-inch screen and preloaded UK and Ireland mapping