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› tp820 storage mode what % ?
08-02-2011 04:49 AM  6 years agoPost 1
inkspot1967

rrProfessor

Cranston Ri

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does anyone know what percentage the tp820 charges batterys to?

i have 2 battery checkers and one reads 49% and the other 59%

kinda confused which one is correct, volts per cell are around 3.83v after storage charge

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08-02-2011 04:58 AM  6 years agoPost 2
Futura SE

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Fayetteville, Arkansas

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3.85v per cell, but it does a little under or over depending on how fast (C rate) you are going. Storage charging at 2C, 3C or etc.

3.85v is where you want them stored.

Norman Ross Jr.

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08-02-2011 05:00 AM  6 years agoPost 3
inkspot1967

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Cranston Ri

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what i want to know is that 60% or 50% from fully charged

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08-02-2011 06:29 AM  6 years agoPost 4
Futura SE

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Fayetteville, Arkansas

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Just over 50%.

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08-02-2011 11:48 AM  6 years agoPost 5
inkspot1967

rrProfessor

Cranston Ri

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Ok thx

Hyperion checker reads 49%
Align checker reads 59%

So my align battery checker reads wrong.
Im kinda anal about checking my batterys after each flight so i want to make im using the right one.

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08-02-2011 09:03 PM  6 years agoPost 6
Paul Woodcock

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Dubai - United Arab Emirates

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Hi

Different charger, but....

On my Graupner, I get a different reading if I charge to 3,9v or discharge to 3,9v.

Regards
Paul

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08-03-2011 09:20 PM  6 years agoPost 7
red_z06

rrProfessor

Dumont, NJ

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Hyperion checker reads 49%
Align checker reads 59%

So my align battery checker reads wrong.
The percentage will vary greatly based on C rating. Only way to be sure is to drain your packs to 50% by measuring the mah during discharge. You then check the voltage of the pack and make a note of it.

After storage charging to 50% on 820, see if the voltage is close. If not, you need to adjust storage % on that pack or class of C rating.

Align checker maybe targeting 20c packs while Hyperion may be measuring 30-40c.

www.JustinJee.com

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08-03-2011 11:03 PM  6 years agoPost 8
flyfish

rrApprentice

New Jersey

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voltage is voltage??? the C rating of a pack will not change that. C rating is the amount of amperage the pack can deliver the higher the C rating the more amps.

i may have this wrong but that is how i understand it.

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08-03-2011 11:14 PM  6 years agoPost 9
red_z06

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Dumont, NJ

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While the full voltage may be the same, empty voltage gets higher with c rating.
So, the resulting 50% voltage differs accordingly.

This is based on the trend I noticed since 6c days (kokam 2004) to current 65c (tp 2011).

What test result are you basing your statement on?

www.JustinJee.com

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