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LiIon, LiPo, NiCd & NiMh General General Battery Support |
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#1 (permalink) |
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![]() For a more complete education.. be sure to visit tjinguys site:
http://sites.google.com/site/tjinguy...arging-how-tos Cheat sheet for lipos
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"It's not just a hobby... it's a lifestyle" - Pete ϟ MINNESOTA! Goblin 500 + 700 / SK540 / Jives / DX8 / Quantum / RJX servos / 306b / Deep cycles Last edited by Slyster; 09-05-2011 at 02:45 AM.. |
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#2 (permalink) |
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![]() Anyone with additions, changes, or corrections please PM me!
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"It's not just a hobby... it's a lifestyle" - Pete ϟ MINNESOTA! Goblin 500 + 700 / SK540 / Jives / DX8 / Quantum / RJX servos / 306b / Deep cycles Last edited by Slyster; 09-03-2011 at 04:12 PM.. |
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#3 (permalink) |
HF Support
Join Date: Sep 2006
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![]() Generally very good advice, personally I have never done preflight discharge/charge cycles otherwise I would agree with these guidelines. It is essential if you do multiple pack charging that each pack is correctly connected to the charger balancer and verified by reference to the charger display. Hyperion Duo chargers are designed just for this.
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John |
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#4 (permalink) |
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![]() Thank you mods!
If anyone has things I should delete or add or changed let me know.... so this can be an accurate guide for the new guys that are always coming through.
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"It's not just a hobby... it's a lifestyle" - Pete ϟ MINNESOTA! Goblin 500 + 700 / SK540 / Jives / DX8 / Quantum / RJX servos / 306b / Deep cycles |
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#5 (permalink) |
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Join Date: Sep 2010
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![]() Awesome write up Sly
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#6 (permalink) |
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Gerald Williams Goblin Black Thunder, Goblin 500, Gaui X7, X5, NX4, X3 |
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#7 (permalink) |
The Capi
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![]() I wouldnt leave lipos charged for more than a day, after 3 days you will lose alot of power.
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#8 (permalink) |
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![]() I would add that the damage from leaving a battery fully charged in cumulative. Every hour that it is left fully charged adds up. Leaving a battery fully charged for 6 hours a day for a year is equivalent to leaving it charged for 3 months straight.
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#9 (permalink) |
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![]() Funny.. I actually had that in there and someone told me i was being too long winded so I took it out. I'll add it again.
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"It's not just a hobby... it's a lifestyle" - Pete ϟ MINNESOTA! Goblin 500 + 700 / SK540 / Jives / DX8 / Quantum / RJX servos / 306b / Deep cycles |
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#10 (permalink) |
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Join Date: Mar 2010
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![]() I must be doing this wrong 80 percent of 2650 is 2120 I'm using 281.3 per minute that is like 1 minute 45 seconds no way us that true
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#11 (permalink) |
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![]() 281mah/minute? That equates to a 7.5 minute flight before hitting 80% capacity used. That sounds reasonable. I would set my timer to 6.5 mins to be safe. And as skills progress.. so does mah consumption. So monitor your charger periodically.
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"It's not just a hobby... it's a lifestyle" - Pete ϟ MINNESOTA! Goblin 500 + 700 / SK540 / Jives / DX8 / Quantum / RJX servos / 306b / Deep cycles |
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#12 (permalink) |
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Join Date: Mar 2010
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![]() Do you think you can post the way the exact way you did the equation? I fly with a turnigy typhoon 3500kv w/10 pinion and a turnigy dlux 40amp esc, zippy flightmax 2650Mah 3s batterys. I've been draining my batterys down to 3.82v the lowest i ever got was 3.73v that is Flying for 7.30 min. Thanks for the help love this website and always interested in talkin helis and makin friends!
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#13 (permalink) |
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![]() Here's an example using a 6s5000mah pack.
Putting back 80% capacity into a 5000mah pack would be 4000mah. Thats as far as you can go (for the sake of the lipo). Generally you don't want to even go that far. So after a 5 minutes flight lets say you put back 3200mah. Divided 3200mah by 5 minutes and you get 640mah per minute. Now divide the safe draw on 4000mah by 650mah and you get a total flight time of 6:09 minutes. But that is MAX. So in that example I'd probably set my timer to 5:30. Some helis can't even go 4 minutes. So it might be wise to fly 3 mins for your first lipo test and divide the mah put back in by 3.
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"It's not just a hobby... it's a lifestyle" - Pete ϟ MINNESOTA! Goblin 500 + 700 / SK540 / Jives / DX8 / Quantum / RJX servos / 306b / Deep cycles |
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#14 (permalink) |
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Join Date: Mar 2007
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![]() How do you store your lipos? Fire proof safe, Lipo sack, etc? Do you store them in you garage, home or a hobby shed if you have one?.
thanks you. |
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#15 (permalink) |
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![]() It is important to store lipos safely. Most often fire incidents occur during charge or after a crash.. but there have been a few confirmed reports of a lipo just going off in storage!
Some use ammo cans, fire safes, gun safes, lipo sacks. Just make sure there are holes for gasses to escape otherwise you just might have a container explode as well! My cheap bulletproof method... $10 or so.. and with some tests done on YouTube.. lipos burning up in a cinder block barely makes the concrete even warm. Make sure you have flat blocks for the bottom and top. ![]() ![]() ![]() ![]() ![]() ![]()
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"It's not just a hobby... it's a lifestyle" - Pete ϟ MINNESOTA! Goblin 500 + 700 / SK540 / Jives / DX8 / Quantum / RJX servos / 306b / Deep cycles Last edited by Slyster; 10-16-2011 at 03:11 PM.. |
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#16 (permalink) |
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Join Date: Feb 2010
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![]() Hey Slyster
After I finish an average flight my batts are around 3.7 to 3.9 volts per cell, and then within 6 hours I charge them to 4.1 volts and leave for a week (or sometimes more)until I use again. However, going on the initial Lipo rules you set out I should be using my batts, and when I have finished flying I should leave them at say 3.8 volts and not charge until the night before or day I want to fly again??, Or should I use them, then charge to 4.1v and then discharge to 3.8 for the weeks storage?? Thanks
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#17 (permalink) |
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![]() Why charge to 4.1v? I just wonder where you got number. Full is 4.2v/cell. I would always charge (or discharge) to storage level at the end of the flying day... regardless if I am going to fly in a day or a week or a month.
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"It's not just a hobby... it's a lifestyle" - Pete ϟ MINNESOTA! Goblin 500 + 700 / SK540 / Jives / DX8 / Quantum / RJX servos / 306b / Deep cycles |
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#18 (permalink) |
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Join Date: Feb 2010
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![]() Sorry, typo 4.2 v
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#19 (permalink) |
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![]() Yeah... full... even for a few days.. and your packs just won't have the same punch again.
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"It's not just a hobby... it's a lifestyle" - Pete ϟ MINNESOTA! Goblin 500 + 700 / SK540 / Jives / DX8 / Quantum / RJX servos / 306b / Deep cycles |
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#20 (permalink) |
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Join Date: Feb 2010
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![]() Ok thanks,
I'll discharge the batts by flying them down to the average of 3.8 v and just leave at that until I want to fly again. I thought that storage requirements was for longer periods, like a month or more. Interestingly I haven't had any batts deteriorate from my charging and leaving for a week! Maybe just lucky or maybe the damage will manifest itself later in the batteries life. Phil
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