Ace of gens battery

IR readings are only good to compare values on the same charger. They are only relative and not absolute, for that you would need a special instrument and it must match the batteries chemistry as well (HV typically doesn't work well). Not worth it unless you are into lipo testing (and not using)
IR always changes while you are charging and usually the one at full charge is closer to reality than the others.

My rule of thumb-> below 10m - keep on moving, nothing to see. Above 10, still ok as long as all cells are relatively equal. Above 20 you probably see runtime issues.

jkflow said:

LVC on an ECS is only in place to protect the ESC from low voltage damage. Don't ever run to those levels. Learn how to end your runs sooner.

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1000%. LVC is like driving your car until it stops on the freeway because it ran out of gas.

jkflow said:

IR readings are only good to compare values on the same charger. They are only relative and not absolute, for that you would need a special instrument and it must match the batteries chemistry as well (HV typically doesn't work well). Not worth it unless you are into lipo testing (and not using)
IR always changes while you are charging and usually the one at full charge is closer to reality than the others.

My rule of thumb-> below 10m - keep on moving, nothing to see. Above 10, still ok as long as all cells are relatively equal. Above 20 you probably see runtime issues.

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Even without ir readings often times I can tell by changes in runtimes and the temp of the battery afterrun that things are going south. I went years without an ir reading.

jkflow said:

LVC on an ECS is only in place to protect the ESC from low voltage damage. Don't ever run to those levels. Learn how to end your runs sooner.

Click to expand...

Huh? I'm not sure I follow that. If I have an ESC that runs 3S-8S, that's a voltage range of 12.6-33.6V max. How can I run an 8S configuration down to 9.6V (3S Min) without damaging a battery?

LibertyMKiii said:

I think toolkit is iSDT which are decent products, but I agree. I don't trust the readings on chargers.

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Agree, i've heard good things about those chargers. I'd use IR readings only as a ball park gauge.

Kiba.k9 said:

As of right now

View attachment 364861

Switched to charge


Both my 6s gens-ace-r-spam battery ohms


Both my gens/ace battery ohms

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Frankly, IR can change from charge to charge. And even during the same charge cycle, cell #1 could be lowest IR when you first start charging, but then be the highest at the end of the charge. IR can change with cell voltage, temperature, frequency of lipo use, and of course damage (over discharge, lipo ejection, etc).

Knowing that, IR measurements can only be accurately compared when using the same charger, with the same battery, at the same temperature. Ideally, you'll get a baseline for IR when you first get the batteries, then you'd be checking IR every now and then to see if the IR increases substantially. That's the way I'd say IR is most useful. For example: if you got a baseline IR the day you bought it, and then one day when the lipos were cold you were charging your them and got IR measurements double what you initially did, i'd say those are not reliable or meaningful results.

Jerold said:

Huh? I'm not sure I follow that. If I have an ESC that runs 3S-8S, that's a voltage range of 12.6-33.6V max. How can I run an 8S configuration down to 9.6V (3S Min) without damaging a battery?

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I assume he meant protect the lipo from low voltage damage?

You will damage the battery, no doubt. The LVC is still there to protect the ESC from short circuiting though. Once you cross a certain voltage differential (based on auto-range) there has always been the risk of damaging the ESC itself. Typically below 3V/cell you can have malfunctions/short circuits which can damage the ESC. That is why they usually have a default of 3.2V/cell.
Now, more recently, the ESC companies have picked up on the need to also protect the battery and gave users the ability to select higher voltages but they will always have the lowest in the 3V range.
This is true for the mainstream run0-of-the-mill ESCs, there has always been exceptions (Castle and some others, don't know all of them) that don't have the low-volt short circuit issues or they have aded statements in the manual that disabling LVC can cause damage.