Originally Posted by focae
I don't know the chemistry involved but all batteries have chemical reactions taking place regardless of the state of charge. You may be aware of car batteries 'sulphating' if left in a discharged state for long periods.
It is a characteristic of lipos for the latent reaction when no current is flowing to be worse when fully charged than when discharged. Unfortunately for us, if lipos are left discharged for too long they will not recover their ability to accept charge. This is also true if they are allowed to fall below a critical voltage.
We can't leave our lipos charged because they will destroy themelves over time, and we can't leave them discharged because they may then not accept a charge later, so we have to make a compromise and store them at 3.8V per cell.
Lost several batteries due to storing them charged. I picked up the same tip from this guy http://youtube.com/watch?v=ZJHlJYDJohc
about storing them between 3.7 and 3.85. He's a pretty knowledgeable and helpful guy. I've learned a bunch from him. Anyways, I haven't lost anymore since following this advice.
I just got my first funfighter (P40) yesterday. I'm hoping the slightly larger size and colors will make it easier to track? I'm about 160 pages into this thread but I'm not sure I've got the patience to read it all! Going to start with 3s 1300's on stock set up then move to 4s 1000's with a plush 40 esc once I'm comfortable with it. I've been having a blast flying my HK Skyfun jet which averages 105-110 mph, but these just look like a ton of fun. I've been bitten by the speed bug and am quickly becoming addicted! I'm already looking ahead to something much bigger AND fast... Sundowner 50? Sundowner 36? Shoestring? Not really interested in competition, just the knee knocking rush that flying fast gives us. Oh, the possibilities...
. Looking forward to the maiden of the P40 sometime this week!