Zbig
Second Officer
Flight distance : 7349 ft
Poland
Offline
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Gunship9 Posted at 2018-1-29 11:08
It never did. There is no mah measuring meter. There are only voltmeters. And in use, volt meters and algorithms that estimate mah based on voltage drop during the flight. You need to put a known load on the battery and measure the current flow over measured time to know the capacity of your battery. Adjust your variable load until you are pulling 1.48 amps and see if it lasts an hour.
Get an eraser and clean your drone's battery contacts so you don't have a voltage drop across them and then look at your battery mah app page.
Not quite. There is, in fact, a "Coulomb counting" mechanism built into the battery. When trying to estimate the remaining battery capacity somewhat accurately, you never rely on the voltage alone in an application like this. With a load this heavy and so wildly varying with so many variables like instantaneous current surges when you perform a demanding maneuver or when the drone is fighting the wind, the battery voltage is all over the place, sagging and recovering during the whole discharge cycle. The way Spark and its batteries (smartphones, laptops, etc. being another example) deal with that is to actually keep track of the cumulative charge they've received during the charge and then subtract the integrated instantaneous current and voltage over time as they use the stored energy during the flight in order to get a fairly accurate figure of the remaining battery charge. |
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