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01-25-2007 08:41 PM  10 years agoPost 1
grock

rrApprentice

Israel

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Hey,
I have a sonix 1200mah battery from helidirect, And I'm trying to charge it on my robbe lipomat 5-4000 charger with built-in balancer. While I charged it, I checked everytime the voltage and after an hour it was 12.60 Volts. 4.20V each cell.
Then, I disconnected the battery and checked again the voltage. this time it was 12.57V, 4.19V each cell. When I'm connecting the battery to the esc(eflite 3in1 for now) and checking the voltage, I get again 12.60V, 4.20V..

Why is that? Should I check my battery voltage when it's connected to something(charger, esc, 3 in 1) ?

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01-25-2007 09:39 PM  10 years agoPost 2
smcbmw

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Louisville, Kentucky

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I think this very small difference is probally normal. Many things can effect the exact voltage and be causing your small differences. Does your charger give you the voltage? If you are checking it with a digital volt meter than many things can effect it. I don't think you have to much to worry about as long as you don't over discharge your batts.

10-8

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01-25-2007 09:43 PM  10 years agoPost 3
grock

rrApprentice

Israel

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That's what I thought. Thanks.
I have this 3 cells lipo, and the lowest voltage I ever measured is 11.21.. Is this good? someone told me it should be good until one cell is below 3.2V. keeping on 3.7V as the lowest voltage is the safest way to keep your lipo working for many many cycles..

Does it true?

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01-26-2007 03:20 AM  10 years agoPost 4
smcbmw

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Louisville, Kentucky

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I never discharge my voltage down on my 3cells past about 11.4. The important thing is the amount of milliamps you are putting back into them. Does your charger tell you this??? I never draw more than 80 percent of the mah out of the pack. a 2200 pack should put back about 1760 mah. I always play it safe and usually put about 1200-1500 back into my pack.

10-8

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01-26-2007 01:15 PM  10 years agoPost 5
grock

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Israel

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That's strange, many people told me that you should charge at 1C..
My charger let me charger in 1A, 2A and 4A..

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01-26-2007 01:20 PM  10 years agoPost 6
smcbmw

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Louisville, Kentucky

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You should never charge at a rate more than 1c but keep track of the milliamps you put back into the battery. a 2200 mah battery should never be charged at more than 2.2 amps unless you like fireballs. I have a triton jr charger and it tells me (as it is charging) how many mah are being put back into the battery. At the end of the charge I can see how many mah it took to reach the batteries full capacity.

10-8

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