GadgetGuy
Premium Pilot
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Unlike the P3P batteries, the P4 and P4P batteries will not charge in the charger to top them off to 100%, even if you turn them on, unless the remaining battery is 97% or less. Hence, your only option is to first bleed them down below 97% by leaving them on, or putting them in the aircraft and turning them on until they bleed down to 97% or below. Big time waster when you want to leave the house with multiple, fully topped off batteries! Dumb change by DJI, who told us never to fly unless your pack is first fully charged to 100%! This leads to reusing the same battery over and over, instead of changing of rotating multiple batteries each day, as the one charged last night will be the only one at 100%, but the one charged several days ago will only be at 98 or 99%, and has to be bled off to top off!In order to be able to charge the DJI battery at 100% when has lost a little bit of power, but not enough for the logic of the trigger to start again a charge, could be possible to bypass the trigger threshold switching on the battery (with the usual double press, 1 short, 1 long) before connecting it to the charger.
Then after few seconds the charge probably starts.
If not, usually is enough to discharge a little bit more the battery, for about 3 minutes or even less (switching on inside the aircraft, no need to fly) and repeat the steps above.