AlansDronePics
Captain
Flight distance : 814751 ft
Guernsey
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Smashey1 Posted at 5-31 13:24
Forgive the question but this seems to conflict with other battery advice on this forum where several members suggest avoiding deeply discharging your batteries - trying to leave about 30% charge at the end of the flight - as this will prolong the life of the batteries.
I’m a novice but I’m now confused as to the best approach.
If you read any LiPo battery manufacturers technical literature, you will get the best advice.
The things you will learn from them are:-
The cells are a mix of chemicals that start degrading the moment the cells are assembled, unlike a machine, for example. Use them or don't use them, they are always degrading.
The chemical reactions in the cells have predictable limits. Overcharging and over-discharging will rapidly damage the cell. Overcharging is hard to do with the battery electronics that control the process, but charging while warm or hot will tend to cause swelling from gasses in the cell. The swelling usually allows the cell layers to seperate, leading to localised overheating in the cell or sudden electrical failure. The gas is flamable.
Depending on what level the shut-off is in the cell and that is set by the battery control circuit , taking the remaining charge down to zero% risks stopping the battery from recharging, at all. Very low charge states always allows lithium to be deposited on the electrode and this is an irriversable barrier to the chemical process. This will also reduce the power capacity of the cell.
Whilst I wouldn't go below 30%, other users seem to do so and with no reported failures. That isn't contradicting the known chemistry, but more to do with the % of capacity the battery claims. It isn't a real measurement, like 1Km is.
Depending on the model of drone, the battery may be undersized for someone who wants high speed. The MP seems sized about right, in my view, unless you use sports mode predominately in a hot climate. A battery that has to pump out full power most of the time and overheats inside will soon fail.
Do check these facts with a manufacturer's site. |
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