02-17-2013, 07:32 PM | #1 |
Quarry Creeper Join Date: Nov 2012 Location: oshkosh
Posts: 206
| Lipo storage
My ac6 charger has a storage mode but it only runs them down to 3.8v per cell does this sound right? And my discharge on the charger only lets the batteries run down to 3.6v per cell but is set to go down to 6v. These r 2s sky lipos been cycled probably close to 20-25 times
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02-17-2013, 07:54 PM | #2 |
Suck it up! Join Date: Mar 2008 Location: Arkansas
Posts: 11,652
| Re: Lipo storage
You don't want them fully charged or discharged, just somewhere in between. If a pack is dead, I'll bring it up to roughly half capacity. If its fresh I'll throw it in a rig and drive it around a bit.
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02-17-2013, 08:04 PM | #3 |
Quarry Creeper Join Date: Nov 2012 Location: oshkosh
Posts: 206
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So y does it charge them to 8.4v when there 7.4v packs? I dont know to much about lipos and do life packs do better in the cold cuz I think I got my lipos to cold today and now there not as peppy. Almost like its hitting lipo cutoff then have to double tap throttle to get a burst
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02-17-2013, 10:09 PM | #4 |
Quarry Creeper Join Date: Sep 2012 Location: middle of nowhere
Posts: 232
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A fully charged lipo has 4.2 volts/cell hence a 2s would be 8.4 7.4 would be 3.7 volts/cell wich is halfway between 4.2(max) and 3.2 the lowest you EVER want your lipo to reach. 7.4 is a nominal voltage rating. Sent from my iPhone using autocorrect |
02-17-2013, 10:15 PM | #5 |
Quarry Creeper Join Date: Nov 2012 Location: oshkosh
Posts: 206
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Then y not lable them as 8.4v? But may have ruined them to cuz I was using the default lupo cutoff setting which it doesn't specify what volt cutoff is. Running the stock axial esc but changed it to 6.6v now
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02-18-2013, 02:47 AM | #6 | |
Pebble Pounder Join Date: Jun 2011 Location: Finland
Posts: 116
| Re: Lipo storage Quote:
Them packs should be fine with default Auto cut off.. If AE-2 has same as cc sidewinder (practically same esc with less features..) the default cut off is 3,2V per cell witch is more than fine. 3V is the absolute minimum for lipo cells.. And lipos do NOT like cold, when winter flying my planes, I keep my batteries at my pocket.. If I keep them at my field box at -10c, teh plane is loosing almost half of its power.. but if I put warm pack on it and go fly, the discharge/iR keeps it warm enough even at sky in airflow.. | |
02-18-2013, 04:02 AM | #7 | |
Quarry Creeper Join Date: Sep 2012 Location: middle of nowhere
Posts: 232
| Quote:
According to the manual my tekin B1R in my MRC is set to 6V (too low IMO) and I'm to cheap to buy a Hotwire so I run an LVA set at 3.4V a cell. I also like the idea of measuring each cell not just the 2 or 3 cells in series. One cell might drop off faster than another especially in older packs. Sent from my iPhone using autocorrect Last edited by happymachinist; 02-18-2013 at 04:06 AM. | |
02-18-2013, 11:20 AM | #8 | |
Quarry Creeper Join Date: Nov 2012 Location: oshkosh
Posts: 206
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