The unit I am considering draws about 3.5mA continuous when in sleep mode. For about 1 minute in a 24 hour period it will wake up and do something (acquire satellite, send a GPRS packet over GSM radio, etc) which increases the current draw to 13 mA and then it's back to sleep again for 24...
I'm working on a project where I need to deploy GPS devices in remote areas. Typical batteries only last a few days to a few weeks, depending on mode the device is in.
I need a battery that will remain charged for a year or longer under typical draw, if such a beast exists. Size is not...
