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Batteries & Chargers Discuss Li-P, Li-Ion, NiMh, Nicad battery technology and the chargers that juice 'em up!

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Old 12-22-2012, 05:26 PM   #1
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Default Charger cuts off at 4.26 per cell high or?

Is that very high? How high would make you worried per cell?
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Old 12-22-2012, 06:01 PM   #2
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If it's an accurate measurement it's too high. I like to see 4.20V or less. But I wouldn't actually worry until/unless I'd checked it myself with a meter I know to be accurate. Some chargers report all sorts of odd voltages. I had one a while ago that cut off the charge at a reasonable voltage but consistently reported 0.2V high overall i.e. it stopped at 12.6V but said it was 12.8V .

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Old 12-22-2012, 06:01 PM   #3
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the guidance I've read says to never exceed 4.22v per cell. So yes, 4.26V is worryingly high.

Is this because the cells were not balanced?
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Old 12-22-2012, 06:49 PM   #4
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Originally Posted by Epowerreg View Post
Is that very high? How high would make you worried per cell?
What make and model of charger do you have?

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Old 12-22-2012, 08:14 PM   #5
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Is the Supermate dc6. When using balance the volt per cell is 4.17 This over voltage occurs with just a normal lipo charge selected.
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Old 12-22-2012, 09:44 PM   #6
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I'd suspect the accuracy of the meter being used to measure the voltage. Do you have a known accurate meter to check it against? Chances are the voltage is not quite what you are reading. However, if it is an accurate reading, I'd recalibrate the charger or use a different one.
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Old 12-23-2012, 02:39 PM   #7
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Originally Posted by Epowerreg View Post
Is the Supermate dc6. When using balance the volt per cell is 4.17 This over voltage occurs with just a normal lipo charge selected.
Something about this isn't quite adding up.

You're saying that on a non-balanced charge the cv portion of charge is reading 4.26 per cell? How are you getting this reading? The resting voltage is probably well below 4.2 volts, right?

Are you saying that when balance plug is used the reading is 4.17 on the cv stage? How do you get this reading?

The only way I can guess this happens is that perhaps this is the reading from a pack's highest cell during a non-balanced charge and is the highest reading it gets to upon termination of the charge? If this is the case then the pack is just unbalanced and needs balanced.
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