AlansDronePics
Captain
Flight distance : 814751 ft
Guernsey
Offline
|
Only DJI know how their charger and battery circuitry works, so the correct answer can only be given by them.
The first unknown is what happens when the cells are fully charged. High-end chargers and in this case, it includes the circuit in the battery, will monitor the voltage of the battery. Depending on the health of the cells, this voltage will drop over time. A new battery will retain the voltage for many hours and a heavily used on will show a volt drop quite quickly. The used cells will be frequently topped up to the peak voltage and the worse the battery health, the more heat is generated with detriment to the chemicals in the cell. You can see this effect if you fully charge a cheap power bank until the charge light goes out. Switch off the charger for a few minutes and then switch back on. The charge light will light again. This doesn't happen with my DJI batteries and charger. I would expect the system to be high-end and allow for the voltage drop to a greater extent.
The other unknown is the degree of current that discharges from the battery, back into the switched-off charger. I would expect it to be microamps and a day or so connected up will make no difference to anything. That isn't the case with cheap power banks.
Play safe, remove them from the charger as soon as you happen to see them fully charged. I have (unwisely) charged up overnight for an early morning flight with no ill effects. I don't do that with my camera and other chargeable equipment. LiPos on charge and left unattended, are a risk I am happy to avoid.
As you say, a 3 year old battery with 192 charge cycles, able to poke out the full wack of juice, is proof you are not abusing them. Only another 300 charges and you will have achieved manufactures expectations. |
|