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Old 03-29-2019 | 06:11 AM
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I have a 5000mah Onyx 3s lipo that I haven't used in 4 years. I use this in my crawler. I've kept it in storage mode at 3.8 volts per cell. I checked it last night and it was at 3.7 volts per cell. Is it still good? Or should I just get a new one? Thanks.
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Old 03-29-2019 | 06:29 AM
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Should be fine.
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Old 03-29-2019 | 08:04 AM
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Originally Posted by Billy Kelly
Should be fine.
Great! Thank you
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Old 03-30-2019 | 07:00 AM
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Really depends on the temperature you stored your battery, more than likely you will have lost a significant amount of capacity and the IR (internal resistance) will no longer be matched between the cells and cause significant imbalance toward the end of the discharge cycle. At the very least I would increase your LVC to the highest possible setting just to play it safe as LVC doesn't work on individual cells... take note of how far the cells are out of balance when you first place the pack on the charger after a discharge cycle.. if any individual cell is below 3.0V then I would replace the pack. More info here:
https://batteryuniversity.com/learn/...ased_batteries
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Old 03-30-2019 | 09:22 AM
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Originally Posted by billdelong
Really depends on the temperature you stored your battery, more than likely you will have lost a significant amount of capacity and the IR (internal resistance) will no longer be matched between the cells and cause significant imbalance toward the end of the discharge cycle. At the very least I would increase your LVC to the highest possible setting just to play it safe as LVC doesn't work on individual cells... take note of how far the cells are out of balance when you first place the pack on the charger after a discharge cycle.. if any individual cell is below 3.0V then I would replace the pack. More info here:
https://batteryuniversity.com/learn/...ased_batteries
when I plugged in the battery to a battery tester, all three cells were at 3.70. It was stored in a lipo bag in a bedroom closet at 77 degrees. I will turn up the lvc as high as it will go on the castle Mamba Pro ESC that is in my crawler. Thanks for your help Bill, I appreciate it.

Last edited by MaX-D; 03-30-2019 at 11:51 AM.
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Old 03-31-2019 | 09:32 AM
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3.7V/cell is good for storage, but be sure to check the voltage of each cell after LVC is triggered, that's the critical point to determine if it's time to replace the pack if any cells have dropped below 3.0V
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Old 03-31-2019 | 02:25 PM
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Originally Posted by billdelong
3.7V/cell is good for storage, but be sure to check the voltage of each cell after LVC is triggered, that's the critical point to determine if it's time to replace the pack if any cells have dropped below 3.0V
This is good to know. Thank you!
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