Hi guys !
I'll be a Mavic owner soon, and I'm already looking for battery improvement.
Depending on how much risks (about having a dead battery) we're willing to put on, I think there is a way to replace LiPo cells by Li-Ion cells, still using the same battery circuit board. Picture of the board there.
After some calculations (mostly based on internet researches), there is a way to improve mAh capacity by 50% by adding ~50g (battery weight estimated of 280-290g).
It's about swapping the 3S1P (which means 3 batteries in series) original LiPo, by a 3S2P (which means 2 parallel circuits of 3 batteries in serie) which is 6 cells of NCR18650PF Li-Ion.
The increase would be going from the original 3830mAh 340g, to a 5500mAh ~380-390g (depending of the circtuitry's weight).
One of the advantages is that we would be able to charge the battery using the tradidionnal charger, and no risks of surtension by branching the battery externally like some other mods are offering.
The negative side is that we'll need to get rid of the hard case, the batterry will be a little bit bulkier.
There is some data research needed to be sure that the calculations are correct and the improvement possible.
Still not having yet in possession the Mavic, do some owners are willing to share some .DAT log files of a full lenght flight to make some checks about tension, current, min/max draw... ?
And other test would be to study data log for a full flight with an added weight of ~100g on top to compare current draw and flying time evolution.
Looking forward to see if some of you are interested to try going on this way, have a nice fly !
PS: I'm not under FAA/US regulation and always flying LoS or FPV, just want to improve flight duration as safely as possible and having fun proving that we can improve consummer goods.
Be responsible and remember that local regulations apply ;-)
I'll be a Mavic owner soon, and I'm already looking for battery improvement.
Depending on how much risks (about having a dead battery) we're willing to put on, I think there is a way to replace LiPo cells by Li-Ion cells, still using the same battery circuit board. Picture of the board there.
After some calculations (mostly based on internet researches), there is a way to improve mAh capacity by 50% by adding ~50g (battery weight estimated of 280-290g).
It's about swapping the 3S1P (which means 3 batteries in series) original LiPo, by a 3S2P (which means 2 parallel circuits of 3 batteries in serie) which is 6 cells of NCR18650PF Li-Ion.
The increase would be going from the original 3830mAh 340g, to a 5500mAh ~380-390g (depending of the circtuitry's weight).
One of the advantages is that we would be able to charge the battery using the tradidionnal charger, and no risks of surtension by branching the battery externally like some other mods are offering.
The negative side is that we'll need to get rid of the hard case, the batterry will be a little bit bulkier.
There is some data research needed to be sure that the calculations are correct and the improvement possible.
Still not having yet in possession the Mavic, do some owners are willing to share some .DAT log files of a full lenght flight to make some checks about tension, current, min/max draw... ?
And other test would be to study data log for a full flight with an added weight of ~100g on top to compare current draw and flying time evolution.
Looking forward to see if some of you are interested to try going on this way, have a nice fly !
PS: I'm not under FAA/US regulation and always flying LoS or FPV, just want to improve flight duration as safely as possible and having fun proving that we can improve consummer goods.
Be responsible and remember that local regulations apply ;-)