# Is there a way to test transmitter battery life w/o starting a session? **URL:** \ **Category:** C/GM\ **Tags:** cgm, dexcom\ **Created:** [September 29, 2017, 3:43pm UTC](https://forum.fudiabetes.org/t/is-there-a-way-to-test-transmitter-battery-life-w-o-starting-a-session/2204 "2017-09-29T15:43:54Z")\ **Posts on this page:** 1\ **Showing post:** 16
**Author:** ![MM2](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.fudiabetes.org/mm2/32/3032_2.png) [@MM2](https://forum.fudiabetes.org/u/MM2)\ **Post date:** [May 10, 2019, 1:15am UTC](https://forum.fudiabetes.org/t/is-there-a-way-to-test-transmitter-battery-life-w-o-starting-a-session/2204/16 "2019-05-10T01:15:13Z")
> [@redhawks2](#): > > Is there a way to check the voltage on the trans I have that is not attached to the sensor? You may find this discussion helpful. > [@How Long Does a G5 Transmitter REALLY Last? \*\*UPDATE-Transmitter Died\*\* UPDATE-New Transmitter \*\*\*UPDATE-2nd Transmitter sob](https://forum.fudiabetes.org/t/how-long-does-a-g5-transmitter-really-last-update-transmitter-died-update-new-transmitter-update-2nd-transmitter/1307): > > The Dexcom G5 transmitter will shut off after 105 days via a software command from the receiver. But that doesn’t mean the battery is dead or that the transmitter ceases functioning. It just means that the G5 receiver will no longer accept readings from it. So just how long will the transmitter battery last? Mine is at 123 days and still pretty strong. I’ll keep updating each week until it dies. Note that voltages and resistance are still in the excellent range after 123 days. BTW, thi… Do you have G4, G5, or G6 transmitter? You might be able to read voltage using xDrip, while transmitter not connected. But doubt anyone has tried. --- _[View the full topic](https://forum.fudiabetes.org/t/is-there-a-way-to-test-transmitter-battery-life-w-o-starting-a-session/2204)._