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CC2650 Wireless MCU running out of battery in 1 day?

Diego Bosco
Prodigy 20 points
Other Parts Discussed in Thread: CC2650

I just received a SensorTag Development Kit Featuring the CC2650 wireless MCU and it's completely dead after 1 day of light use.

Hopefully is the battery. Is there a chance that the CR2032 lithium battery might run out in just a day?

Thanks.

  • 0
    TI__Guru* 85400 points
    Moving this to Bluetooth Low Energy forum.

    Regards,
    Gigi Joseph.
  • 0 in reply to Joseph Gigi
    TI__Mastermind 18780 points
    It depends on what you do with it. Do you have more details on how you used it?
  • 0 in reply to CHS
    Prodigy 40 points

    I purchased two sensortags(CC2650x) a few weeks ago.  The one I have been using heavily is still running.  The other one which I used just a couple of times is dead, battery is dead.  AFAIK it was doing nothing.

    Is it possible that the batteries shipped with the units are of lesser quality...like the first battery you get with a car or a remote control?

    If you have any rough estimates on battery life in low, medium, high usage scenarios it would be helpful.  

    Thanks.

  • 0 in reply to Michael Foglia
    TI__Mastermind 18780 points
    The batteries should be the same and high quality, sounds like bad luck to me. The batteries are not tested on our site, the sensor tag HW is however tested before being shipped as kits. The battery life time will depend on how you use it, unfortunately, I do not have any estimates on battery life time.
  • 0 in reply to CHS
    TI__Guru** 105180 points
    Hi,

    Are you attached to the debugger during use? With the debugger attached, the STK will not enter low power standby.
    The battery life estimates are based on a 1 sec connection interval. Are you using a shorter interval?

    Best wishes
  • 0 in reply to JXS
    Prodigy 10 points

    I have the same issue (CC2650, fw 1.01, hw PCB 1.2).

    I have used the battery that came with the sensor, and a new one. Currently using my 3rd battery.

    For both:

    • I have used the sensor for about 15-30 minutes, with default interval settings (1 sec), and then I switched the sensor off using the on/off switch;
    • I have connected it (only) to the TI app, and for a few minutes using a custom app (Mac OS X);
    • with the second battery I have upgraded the firmware to 1.01
    • When I tried to switch on the sensor again after a few hours the sensor did not switch on (no blinking led) and the sensor did not appear in the app's list of nearby devices.

    So, not quite the advertised "years of battery lifetime from a single coin cell battery".

    Any suggestions?

    Update: and the same for the 3rd battery: empty after a few hours (and switched on for less than 5 minutes). It has only been connected to the standard iOS TI Sensortag app.

  • 0 in reply to W vK
    Intellectual 650 points

    Any update on battery life? I'm no my 3rd battery. only played with TI Sensortag app and attempted to connect otherwise to an app I'm writing.

  • 0 in reply to Leonard Jowers86084
    TI__Guru 55305 points
    What's your HW and SW version on sensortag?

    Does the sensortag stay advertising all the time?
  • 0 in reply to Christin Lee
    Intellectual 650 points

    Cristin,

    (I apologize for posting and then not being able to follow up. I've been out of town without the sensortag.)

    The information on the back label is

    1 6 4 2

    BLE

    Rev. 1.3.2

    F W Rev. 1.2.1

    The hardware rev is 1.2/1.3 (1.3 on the PCB silkscreen).

    Firmware revision is 1.30 (May 23 2016).

    Leonard

  • 0 in reply to Leonard Jowers86084
    TI__Guru 55305 points
    When you connected to the app, what's your connection interval? Did you enable all the sensors when you connect?
  • 0 in reply to Christin Lee
    Intellectual 650 points

    The SensorTag V4.0.6 app enables all the sensors initially.

    I have run it at different connection intervals and with all or a few sensors enabled.

    Part of my issue is that the green LED is not a reliable indicator of power.

    Now I turn the SensorTag OFF while watching it on the app.

    I am evaluating SensorTag for an application that will require several sensors to be enabled.

    Has anyone generated a table that describes the effect on battery performance of each sensor and with different (major) settings?