2020/4820/4820i User’s Guide 3 - 3Base Charge ModeIn order for the battery to be charged, there must be enough voltage for thecircuitry to work. There are three methods during which power can be suppliedto the base:1: 9VDC power supply connected to the barrel connector2: 12VDC host power source only3: 5VDC host power source onlyThe chart below describes each selection by condition.Using a slow charge rate draws less current (power) from the input power sourcewhen the battery is mostly discharged.Note: If you attach the 4820/4820i system to a host with a 12V power source,the 12V host is dominant; the system pulls power from the host and notthe 9V power supply. For example, if you have a host system with a 12volt available to the base, it will supersede the 9V power supply. The 9Vsupply is not needed for 12V host applications and only serves as abackup if the system goes down.Scan the appropriate bar code for your application.Default = Automatic.1 2 3Automatic Fast Charge Slow Charge No ChargeFull Charge Rate Fast Charge Fast Charge No ChargeLow Charge Rate Slow Charge Slow Charge No ChargeBattery Charge Off No Charge No Charge No Charge* AutomaticLow Charge RateFull Charge RateBattery Charge Off
