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So reduce your terminal SOC by 100mv and fly your battery down to 11% instead of 25% (accounting for the 14% you haven't put in). Do you double your life cycles then?
That's not a bad way of looking at it. A battery can have 2000 to 2500 25% DoD cycles so you could nearly ignore them!! It can have 1200 to 1500 50% DoD cycles so that's fairly good too but only 300 to 500 100% DoD because we all want to fly for as long as we can.Kind of. My understanding is a cycle is at least half a charge. So if your battery is at 70% and you charge it fully, that doesn't count as a cycle. If your battery is at 30% and you charge it fully, that counts as a cycle.
Sorry charge and discharge is a cycle. For ease of measurement they are assumed to be the same percentage where in the real world they will often be different.
I don't even have my Phantom yet so others maybe able to help there but from my battery knowledge I suspect that cell 1 would have been dragging the chain for at least last couple of flights assuming they were recent ones. Cell 4 was only just starting to go so may not have been noticeable previously.OK...I registered with Healthy Drones and researched my flight...I see the voltage discrepancies...but got no warning on the controller until
it was already too late. relatively new battery- charged 24 times. What could I have done or known before the flight that would have changed
the situation? How do you check a battery to see if it might go bad after the bird is launched?
Not with a DJI battery, two discharge and recharge to/from 50% is one cycle.Sorry charge and discharge is a cycle. For ease of measurement they are assumed to be the same percentage where in the real world they will often be different.
That was my point earlier, you MIGHT get 40% more cycles form a pack by limiting DOD to 50% (in reality most won't run down to 100% DOD and your numbers, with respect to DJI packs, are academic only as the smart board won't allow 100% dod).That's not a bad way of looking at it. A battery can have 2000 to 2500 25% DoD cycles so you could nearly ignore them!! It can have 1200 to 1500 50% DoD cycles so that's fairly good too but only 300 to 500 100% DoD because we all want to fly for as long as we can.
So Gnormands battery is cactus after 24 cycles, does anyone else want to share their battery experiences. Perhaps you could also share if you use you batteries conservatively or not and whether you have made some mistakes with storage.That was my point earlier, you MIGHT get 40% more cycles form a pack by limiting DOD to 50% (in reality most won't run down to 100% DOD and your numbers, with respect to DJI packs, are academic only as the smart board won't allow 100% dod).
And yes we all want longer air time and if that means we get 200 good flights as opposed to hovering awound in close with one eye on the battery % and spreadsheeting battery cost per flight I know which I'm going with.
I would call that 2 x 50% DoD cycles which reduces your battery life by about half the amount of 1 x 100% DoD cycle.Not with a DJI battery, two discharge and recharge to/from 50% is one cycle.
You call it whatever you like, DJI calls both scenarios one cycle. Not everything you read on battery university is current for the new HV LiPO's.I would call that 2 x 50% DoD cycles which reduces your battery life by about half the amount of 1 x 100% DoD cycle.
Fair enough, due you know of any real world battery life experiences that you can share with us.You call it whatever you like, DJI calls both scenarios one cycle. Not everything you read on battery university is current for the new HV LiPO's.
You have covered most, in fact probably all the relavent LiPO chemistry considerations. From a practical perspective I charge as close as possible to when I propose to fly, that often means i stick four packs on the charging hub with a timer before going to bed. I usually plan to land with somewhere above 20% charge although more than once I have been below 3% when I judged poorly. I store packs at 50%. I keep track of the mah put into packs and use that, along with cell variations as the key indicators of condition. I favor my strongest packs for flights out over water or in other circumstances where a mishap may see me loose the AC (no opportunity to recover following a forced landing).Fair enough, due you know of any real world battery life experiences that you can share with us.
The DJI Go app can show battery voltage for you. as well as battery history.Can you check these batteries with a voltage tester before employing them for flight to make sure they read 15.2 v ? What voltage are the prop motors rated for? From my experience with wet cell batteries, the older or more used the battery, the faster they discharge and the more difficult it is to reach full voltage charge .
I doubt if anyone could go wrong with that advice, I expect you extract a long and healthy life from your batteries. May I ask two questions and anyone else please feel free to add your own answers.You have covered most, in fact probably all the relavent LiPO chemistry considerations. From a practical perspective I charge as close as possible to when I propose to fly, that often means i stick four packs on the charging hub with a timer before going to bed. I usually plan to land with somewhere above 20% charge although more than once I have been below 3% when I judged poorly. I store packs at 50%. I keep track of the mah put into packs and use that, along with cell variations as the key indicators of condition. I favor my strongest packs for flights out over water or in other circumstances where a mishap may see me loose the AC (no opportunity to recover following a forced landing).