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Battery charging help lipo

Old 07-30-2013, 05:49 AM
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Default Battery charging help lipo

Hi I have a lipo 7.4v 2s 5200mah battery and trying to charge it with a sigma eq mini balance charger only it's not charging I set the charger to 4 amps for lipo setting but only charges at 1amp the voltage displayed per cell is 3.815 and doesn't go any higher no mater how long it's left on charge is this a broken charger or faulty battery also any info would be great thanks
Old 07-30-2013, 06:03 AM
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Default RE: Battery charging help lipo

Can you cycle the lipo with that charger? Alternatively use the lipo gently, take it down to say 3.5V then try balance charging. See if that is an easy fix" 
Old 08-07-2013, 02:53 AM
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3.8V per cell is about the proper storage voltage. Are you sure that the charger is setup properly?
It's a 45 watt rated charger.
For the 2 cell Lipo, 8.4v should be the full charge voltage. The charge current may cut back
to prevent the charger from going above this voltage.
While a 5200mah pack can easily accept a charge current of 5A, it can only do so when the charge voltage
at 5A is no more than 8.4v or so for a two cell pack.
Old 08-07-2013, 02:51 PM
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I'd think it's a charger problem, at 3.81V and the charge is at 4A it should be balance charging at 4A, when it reaches 4.1V the Amps start to drop off as it moves into the constant voltage stage..
Or it's a user setting mistake.
It's not the best chargers, One with storage/discharge function would be better.

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