Battery Storage revisited
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CraigCam
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It seems the ST battery is more robust. I’ve got an ST that’s two years old now and occasionally I’ll charge it with a real charger. That’s when it drops below 80% typically. I prefer to USB charge after flight post cool down everyday I fly. i put the ST back as close to 100% as possible. I have not experienced huge drops when left alone for long periods.
No probs Wing, you can keeep the ST16 battery fully charge as its a Li-ion battery.
And it takes an eternity to charge it..
PatR
Premium Pilot
Lithium ion batteries are designed to tolerate being stored for long periods in a fully charged state. That’s one of the things that make them ideal as a camera power source. They are also more stable than lithium polymer, which makes them safer for use in general consumer products. Li-on is now also the class standard used for U.N. battery hazard labels and shipping quantity standards.
A shorter statement would be to charge your ST-16 before storing it.
A shorter statement would be to charge your ST-16 before storing it.
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Speaking of charging...... Charged three H batteries and ST16 battery this morning for a client job. Client flaked out. NOW....I either have to come up with another job real fast, or go out and joy-ride my H around somewhere in the next two days. Arggggghhhhh!
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Buy a charger like the morpilot that will also discharge a battery to storage levels automaticly.
FlushVision
Premium Pilot
Go for a joy ride. I dunno where you are but here in the U.K. the weather is glorious at the moment. Yesterday saw me having a hobby flight at Norden Moor in West Yorkshire. Jolly good fun and no client to please even though my arms got badly sunburned.
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Ended up booking two last minute jobs! Used all batteries down to storage level. Sweet!
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Joy riding is still a better choice... the downside of a discharge from full to storage on the DY3/MorPilot, is that the discharge cycle is painfully slow (5+ hours). If instead, you fly each battery down to 14.5V, any remaining discharging can be done on the charger in 30 minutes or less.
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PatR
Premium Pilot
PSA,
After forgetting about a fully charged battery left sitting for about three weeks I can say with absolute certainty that a relatively new, perfectly good battery can be damaged if left fully charged. One cell has dropped over 1/10 of a volt from the others and does not balance after going through a storage-charge-storage cycle. For anyone interested, the pack self discharged roughly 2/10v over a three week period. Moral; don't store your batteries fully charged, and don't get distracted and forget about them.
After forgetting about a fully charged battery left sitting for about three weeks I can say with absolute certainty that a relatively new, perfectly good battery can be damaged if left fully charged. One cell has dropped over 1/10 of a volt from the others and does not balance after going through a storage-charge-storage cycle. For anyone interested, the pack self discharged roughly 2/10v over a three week period. Moral; don't store your batteries fully charged, and don't get distracted and forget about them.
Please tell me not one of the 920 batteries... I feel your pain. I've had 3 early deaths during my learning period about battery care... all from the identical behavior of saying "I'll get to that tomorrow...", which turns into 5 - 14 days later. Laziness with this hobby becomes quite expensive.
PatR
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Glad I saw this to jar my memory . I had three fully charged batteries sitting on the bench . I had ,met to fly after fixing my gimble . I put one on the charger and put it discharge storage mode but looks like it will take a while .
It’s been too hot and windy to fly with temps @ 100 and wind speeds 25 .
I made a quick clamping system to use on the landing gear and just let the bird idle for about 30 mins before it brought the battery voltage down to a safe storage level . Going to discharged the others after I let the aircraft rest a bit.
It was a good test after my crash to see if the motors worked okay and did not heat up with a light load.
It’s been too hot and windy to fly with temps @ 100 and wind speeds 25 .
I made a quick clamping system to use on the landing gear and just let the bird idle for about 30 mins before it brought the battery voltage down to a safe storage level . Going to discharged the others after I let the aircraft rest a bit.
It was a good test after my crash to see if the motors worked okay and did not heat up with a light load.
CraigCam
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How about getting stuck in a meeting and leaving your rig in the car too long? I puffed up five good GiFi 8050 from overheating in the case. It’s a full heavy duty pelican case also. Two actually split the case open. They actually are all still good and balance and have low resistance values in line with each other. They still get one last flight and discharge and then into the storage ammo can. I’ll post a pic of that can later...it’s getting quite the collection of suspect batteries.
FlushVision
Premium Pilot
I dunno if I'm just lucky but I've had just one battery go bad on me in 3.5 years but even then it didn't go puffy..just went to poor airtime. It was one for my P2V+.
Indeed, I thought at the time that I wouldn't be able to replace it because the P2V+ was withdrawn from sale in Summer 2015. Fortunately I found a company based in the Netherlands that still supplied them and it was delivered just a week or so ago. 2 flights on it so far and it looks to be O.K. for what is obviously a knock-off (you just can't get the originals...period)
edit: I had an issue some weeks ago with a H battery. It has fully recovered now. I was thinking of disposing it but after a hover test last week it now seems fine.
Indeed, I thought at the time that I wouldn't be able to replace it because the P2V+ was withdrawn from sale in Summer 2015. Fortunately I found a company based in the Netherlands that still supplied them and it was delivered just a week or so ago. 2 flights on it so far and it looks to be O.K. for what is obviously a knock-off (you just can't get the originals...period)
edit: I had an issue some weeks ago with a H battery. It has fully recovered now. I was thinking of disposing it but after a hover test last week it now seems fine.
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Yeah, I had a P2V battery go puffy on me and never could figure why until bought Typhoon and joined this forum. I always kept my P2V batteries fully charged, butt I used them often. Until...I didn't use them for while... Then one them puffed up.
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Question about the Morpilot -
I have one battery currently at 14.8v. Will this unit bring the level UP into the correct storage voltage zone, or does it only bring it down from a higher voltage?
FlushVision
Premium Pilot
The thing is, the battery that failed was the newest one I had for the P2V+ with the least number of cycles...although it was still over 3 years old...the older batteries are still doing fine and I've just flown them down to exhaustion ready for a rejuvenation cycle (Unlike the H batteries, the P2V+ batteries need to be rejuvenated around every 25 cycles)
