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No.Does the power light on the battery illuminate while performing the auto-discharge?
No.Does the power light on the battery illuminate while performing the auto-discharge?
We really need to test this. I guess the best way would be to set two batteries' discharge timer to 1 day. Tap the button to check the charge on one of them every day. After 3 days, they should both have discharged to storage voltage. If the tapped one doesn't discharge, we know DJI was blowing smoke. If both have discharged, it's working perfectly. If neither has discharged, we have a problem.
I'll try this and see what happens.
generaltso, perhaps DJI support gave you the wrong information. P2 batteries also reset the elapsed days to auto discharge when the battery button is pressed.
If you look in the female connector on the battery you can see different pins, well they could be different pins. Of course the 2x male connections on the charger would bridge those pins. not sure if they were the pins that alokbhargava was talking about? Very curious about how these batteries work, anyone want to open one up lol. That is good news they have hopefully fixed the self discharge timer though!Those "connecting points" are not accessible without tearing up the internal insulation used for the wiring to each of the cells. It's very tight in there. If you destroyed a battery you can likely trace the wires to the boards to figure out where those points are. But since balancing takes place internally through the integrated smarts onboard, I'm not sure why anyone would want access to those balance points.
This is not a DJI thing, it is a characteristic of LIPO chemisty. Store a LIPO at 100% SOC for three months and you can throw it in the bin, the increased internal cell resistance will make it next to useless as far as usable capacity goes.I honestly don't really understand this Lipo Battery discharge... We, wither know it or not all use them and specify a discharge for storage. Most recent laptops or note books use Lipo's, and they say it's ok to be plugged in (hence fully charged) and they don't really say you have to discharge to a lower voltage? They are not recommending to discharge the some lower battery level after being fully charged. Many other items also use Lipos! My case and point, I don't know of any other Lipo battery manufactures that say they should be not be stored at 100% level?
Or could it be more a point of DJI, saying it as a way to hasten the battery refresh cycle?
Quarter watt resistors won't work. If they are in series they will all have over a half watt going through them. Your resistors need to be half watt if they are in series. If you connected 4ea 1600 ohm in parallel, then 1/4 watt resistors would work ok and you'd have your 400 ohm resistance.I proposed 4 resistors, each 1/4 watt, thus totaling to 1 Watt against the total dissipation of 0.566 W
My proposal is to connect 100 + 100 + 100 + 100 ohms in seriesQuarter watt resistors won't work. If they are in series they will all have over a half watt going through them. Your resistors need to be half watt if they are in series. If you connected 4ea 1600 ohm in parallel, then 1/4 watt resistors would work ok and you'd have your 400 ohm resistance.
You cant cheat ohms law John, current is constant and dissipation of each resistor will be well under 1/5 watt per resister at full applied pack voltage.Quarter watt resistors won't work. If they are in series they will all have over a half watt going through them. Your resistors need to be half watt if they are in series. If you connected 4ea 1600 ohm in parallel, then 1/4 watt resistors would work ok and you'd have your 400 ohm resistance.
I honestly don't really understand this Lipo Battery discharge... We, wither know it or not all use them and specify a discharge for storage. Most recent laptops or note books use Lipo's, and they say it's ok to be plugged in (hence fully charged) and they don't really say you have to discharge to a lower voltage? They are not recommending to discharge the some lower battery level after being fully charged. Many other items also use Lipos! My case and point, I don't know of any other Lipo battery manufactures that say they should be not be stored at 100% level?
Or could it be more a point of DJI, saying it as a way to hasten the battery refresh cycle?
We really need to test this. I guess the best way would be to set two batteries' discharge timer to 1 day. Tap the button to check the charge on one of them every day. After 3 days, they should both have discharged to storage voltage. If the tapped one doesn't discharge, we know DJI was blowing smoke. If both have discharged, it's working perfectly. If neither has discharged, we have a problem.
I'll try this and see what happens.
I guess it's still working as designed then.
I think most phone and computer batteries are lithium ion, better suited for mild current draw and also ok leaving fully charged while being plugged in. Lithium polymer batteries don't like to be left sitting fully charged, as the technology is different. Lithium polymer is designed for high current drain, more amps than lithium ion.Well Lipo batteries like Apple uses are the ideal MBP batteries as you charge them every night and then use them up every day. This is the perfect way to use Lipos. Have you noticed people who keep their MBPs on chargers all the time and rarely discharge them get the shortest lifo out of batteries.
Apple also builds their own batteries to fit into unconventional spaces, very clever, and Lipos are perfect for this as they do not have to be cylindrical. They are thin layers of Polymer and chemicals that can be made almost any shape, very thin if need be.
What we call Lipo here is still a lithium ion cell. The distinction seems to be more marketing department lingo and spin than from the R&D area. Same base tech but in a solid package they call it a li ion and in the rc model pouch format for the cells we get the generic li poly name.I think most phone and computer batteries are lithium ion, better suited for mild current draw and also ok leaving fully charged while being plugged in. Lithium polymer batteries don't like to be left sitting fully charged, as the technology is different. Lithium polymer is designed for high current drain, more amps than lithium ion.
Apple actually do use Lipo batteries in the MBP lineup. It was controversial back in 2009. But now many other Laptop manufacturers are using Lipos as well.I think most phone and computer batteries are lithium ion, better suited for mild current draw and also ok leaving fully charged while being plugged in. Lithium polymer batteries don't like to be left sitting fully charged, as the technology is different. Lithium polymer is designed for high current drain, more amps than lithium ion.
Maybe so the battery won't start the discharging process mid flight.Because I want to check the charge.
Why is the battery programmed to reset the auto-discharge timer? What purpose does this serve?
This is not a DJI thing, it is a characteristic of LIPO chemisty. Store a LIPO at 100% SOC for three months and you can throw it in the bin, the increased internal cell resistance will make it next to useless as far as usable capacity goes.