Hi All,

Used my P4P drone over the summer and then stored it for about 6 months. Took it out of storage pushed the battery light and nothing. Plugged it into the charger overnight and nothing. Did some reading online and apparently these are junk if you store them too long which obviously is very frusterating. Went and found my Phantom 3 batery which hasn't been used for over a year at least and pushed the button and boom a single LED. Plugged it into the charger and it is charging right now at about 3 bars. So why is a P3 battery that has been in storage for probably 18 months charges up fine and and a P4 battery that sat six months is garbage.

Thanks in advance,

Greg

HMMMM

Did you have it on the Charge base in " storage mode" ?

If so,  send it to DJI and tell them........

If Not,  try plugging in to charger and hold the button down for a minute or two.... ( a reach at best ) then let sit on the charger overnight....in a barbeque!!! NOT in your house or garage......there is ALWAYS a possibility of fire with Lithium Ion batteries

Randy

No sir I just had it in the case with the drone. It wasn't on a charge base.

I think you got lucky with the P3 battery.

Lipos are like hamsters.  If you ignore them, they die.

Sorry for your loss.

LOL! That is certainly a good way to put it. So I stripped the battery down and disconnected the balancing plug for a while. Reconnected it and got LEDs very briefly and then nothing. I believe it is doing some type of low voltage cutoff check and then disabling the charging when it is too low. I'm going to try and circumvent the PCB and charge the battery directly while monitoring voltage. If I can charge it enough then maybe hook up the PCB and it will pass the test and accept the charging from the power supply.