I read a few days ago (and i cannot find the post but) someone said they had one new/old battery from a Fly More pack and made me think about the possibly i might have one from 1.5 years ago or so (04/17ish). Looked in the trunk of my car (i don't drive it much) and i had a couple of Amazon boxes and one said battery inside bla bla bla on a special sticker. I opened it up and voila! a brand new battery i forgot i had ordered. No i am not rich at all. So from what the others told him the battery is no good and to throw it away if it is out of warranty.

Well i tinker with stuff all my life and fix most of it. Without touching the battery button to see if it would light up i plugged it in the charger that came with my Mavic Pro and one led just flashed for 30 minutes or so. I unplugged the battery and hit the button and one led lit up and didn't go out so i did the double push and it went out. I thought kewls it is going to charge. Put it back on the charger and 2 leds were doing what their supposed to do. After a couple hours i finally had all 4 leds lit so i unplugged it. Hit the button once all 4 lit and stayed on. I did the double push and it lit all 4 and went out. So after all that and make a longer story shorter it works like a charm but will keep an eye on it. All the voltages are on par. I am charging it back up so i can put it in the rotation with my others. So glad it still works

Charged for a 2nd time now I wasn't sure you could wake them up like this when they have sat for so long not being touched.

You got lucky that it was a "new" in box battery that probably had 25% charge which is perfect for storing for long periods of time. If your not going to be using your batteries for a while discharge them to 20%-30% and then store them. Will last a lot longer, also HEAT is a killer for MP batteries keep that in mind on hot summer days ( I had 2 swell up from heat this summer)

Strobing_NYC Posted at 2018-10-22 16:14
You got lucky that it was a "new" in box battery that probably had 25% charge which is perfect for storing for long periods of time. If your not going to be using your batteries for a while discharge them to 20%-30% and then store them. Will last a lot longer, also HEAT is a killer for MP batteries keep that in mind on hot summer days ( I had 2 swell up from heat this summer)

My car is in the garage most of the time but still it isn't heated or cooled for a year and a half. I kind of thought it would take off ok but it did have that one hiccup.

Hi, thanks for reaching DJI Forum. We're glad that the battery is still working. Kindly take time reading this for your reference. Have a safe flight always.

Intelligent Flight Battery Safety Guidelines

DJI Gamora Posted at 2018-10-23 01:58
Hi, thanks for reaching DJI Forum. We're glad that the battery is still working. Kindly take time reading this for your reference. Have a safe flight always.

Intelligent Flight Battery Safety Guidelines

Hi DJI Gamora yes that booklet came with the battery. It is one of yours i ordered through Amazon last April 2017. I have it marked so i can keep an extra eye on it when using it to fly with. Thank you for your concern

rolling56 Posted at 2018-10-23 03:37
Hi DJI Gamora yes that booklet came with the battery. It is one of yours i ordered through Amazon last April 2017. I have it marked so i can keep an extra eye on it when using it to fly with. Thank you for your concern

No worries. Keep us posted.