Replacing Battery for a Garmin 750

• The Garmin Nuvi 750 has an internal, non-replaceable, lithium-ion battery. It is not advisable to try and replace the battery. To reach Garmin Product Support call 913-397-8200 or 800-800-1020. Or go to the official website, at www.garmin.com.
  
  

Maximizing Garmin 750 Battery Life

• If you are using the Garmin 750 features, such as the MP3 Player, the JPEG viewer, the currency converter or the audio player, you can easily go through the device's battery life of between 3 and 7 hours. To maximize the Garmin 750 battery life, turn down the backlight on its screen.
  
  

Garmin 750 Battery Recharge Cycle

• If the battery gauge does not seem accurate, allow the unit to fully discharge, then fully charge it, making sure the charge cycle is not interrupted until finished. The full charge cycle should take about four hours.
  
  

Garmin 750 Recharge Cycle Temperature Requirements

• The Garmin 750 can only be charged at a temperature of between 32 degrees to 113 degrees Fahrenheit. It cannot charge if placed in direct sunlight or in a hot environment.