Need with design a circuit on altium 09 and programming with description.Backup Battery:-
Create a backup battery which can switch ON once the main battery is dead. Also the battery won't be ON all the time I will chose a time to switch ON and remind me the main battery is OFF and how many % left for the backup battery. For example if our main battery dead the backup battery will switch ON at 1:00 pm and staying ON for 5 minutes and it will Automatically send a txt message into my phone saying that ( the main battery need to be charging and am 98% left) after the 5 minutes will switch OFF. Because am doing GPS & GSM tracking system.