Date:	12-5-2009
Number of Hours:	8.00
Brief Description:	EFIS Backup Battery System
I purchased an EFIS backup battery from Grand Rapids to provide the EFIS and AHRS with power if the alternator and then the main battery fails. The battery is self-charging. There is an option to install an isolation switch to prevent the battery from being discharged during normal operation. I opted to install that switch. There is an indicator light which shows when the battery is charging as well.