Is it bad to do something like leave the camera on for the purpose of draining it quickly?


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  1. cabbie

    cabbie Well-Known Member This Topic's Starter

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    I'm attempting this calibration method: Troubleshooting - CyanogenMod Wiki

    When calibrating before, I didn't clear the battery stats, i just did the charge to green, pull charger and let it drain, then just to green etc

    So this is where I am with this method: charged to full, booted into recovery, wiped battery stats, rebooted, let home screens populate fully and pulled charger.

    So now i need to have the phone drain to 0 so it shuts down. If I do something like leave the camera open or other things that drain the battery, will that negatively affect the physical condition of the battery (as in, losing overall capacity) ?
     

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  2. WaSTeLaNd

    WaSTeLaNd Well-Known Member

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    It shouldn't, I wouldn't leave the led flash on thoe
     
  3. novox77

    novox77 Leeeroy Jennnkinnns! VIP Member

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    With Li-Ion, you want to avoid draining it to zero. There's a chance it never charges back up.

    Typically this worst case scenario only happens when you drain it to zero and then you let it sit like that for a prolonged period, where it slow drains its built-in reserve. If you charge it immediately after it dies, it should be ok. The camera may shut off before it detects the battery is that low, or the battery circuitry may tell it to shut off and keep some reserve. People's cell phone batteries die all the time, and they are fine. Just don't let it sit discharged for too long.

    take a look here:
    How to prolong lithium-based batteries


    particularly this paragraph:

    [FONT=Verdana, Arial, Helvetica, sans-serif]"Some lithium-ion batteries fail due to excessive low discharge. If discharged below 2.5 volts per cell, the internal safety circuit opens and the battery appears dead. A charge with the original charger is no longer possible. Some battery analyzers (Cadex) feature a boost function that reactivates the protection circuit of a failed battery and enables a recharge. However, if the cell voltage has fallen below 1.5V/cell and has remained in that state for a few months, a recharge should be avoided because of safety concerns. To prevent failure, never store the battery fully discharged. Apply some charge before storage, and then charge fully before use.[/FONT]"
     
  4. tracerit

    tracerit Well-Known Member

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    i left my camcorder ON and recording and it drained the battery until it died. i also got to 50C and turned off and wouldn't turn back on for 5 minutes until it cooled down. it was VERY hot and i thought i may have destroyed the phone but it came back on later. it drained about 40-50% an hour though.
     
  5. laredo7mm

    laredo7mm Well-Known Member

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    The phone will shut down before you even get close to a low battery voltage issue.
     
  6. One Beast

    One Beast Well-Known Member

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    Take the battery door off and lay the evo on A/C Vent.....:D
     
    WaSTeLaNd likes this.
  7. WaSTeLaNd

    WaSTeLaNd Well-Known Member

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    Magiver evo!!!
     
  8. woofermazing

    woofermazing Well-Known Member

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    So, did you get any improvement from this?
     
  9. cabbie

    cabbie Well-Known Member This Topic's Starter

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    not really
     
  10. Hazy

    Hazy Well-Known Member

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    Thats what i did in my car... i didnt know and it sat close to sunlight for a while and about 40% of the charge got drained in 30 mins. i thought i had killed my EVO lol
     

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