Discussions

battery not correct in telemetry

Posted by armen t on October 19, 2014 at 7:54pm

any one else notice this phenomenon?

and if you turn off and on it will say battery at 100%.

100% of what? does this mean its just a count down and doesnt monitor the voltage?

im gonna need a lipo alarm. 

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Replies

  • Developer
    Bill Bonney October 19, 2014 at 8:12pm
    It does monitor the voltage. But the voltage drop is not linear and almost flat for mid part of energy expenditure for a lipo. The battery % is calculated correctly if you plug in a fully charged battery and have the mAh param set correctly.

    Otherwist the only indicator is low voltage and don't fly less than 3.5 volts per cell
    • armen t > Bill Bonney October 19, 2014 at 10:39pm

      hi Bill and Gary, i was flying in my backyard for about 3 mins and i had a full charge batt in, so i heard car honking in front so i turned off and unplugged the lipo at 74%, handled the visitor and plugged back in,  it read 100% full charge batt. 

      ive tried doing this again and i get same results. so i conclude that i should not power cycle during an outing. i should just replace and recharge otherwise im probably going to drain batt well beyond 3.5v??

      p.s. im using zippy 5000mah 3s. ive changed that in the paramaters.

      thank you

      • Developer
        Bill Bonney > armen t October 20, 2014 at 3:58pm
        As i said, it can measure voltage. You will always know when it drops below the warning level you set. What isn't acurate is power drained, i.e how many amps have been consumed over time. With a fresh battery the calculation is approximae. But a if you power cycle the battery is will get messed up. The dfault behvaiour will reset to 100%
    • Moderator
      Gary Mortimer > Bill Bonney October 19, 2014 at 10:36pm

      Also if you say its not correct, have you entered the correct value for the size of battery you are using?? It can't detect battery size.

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