solentlife
Now before I tell the tale ... let me first say - that I am not usually absent-minded or ignore LiPo use guidelines. I may not use ammo boxes and flower pots - but I am conscious of their destructive capability.

OK ... that said :

Yesterday - I decided to try and find out why my GuanLi Catalina cannot take off from grass. The modifications etc. are subject of another thread.

Anyway - I pick up the model and do the biz etc. On opening up the hatch ... BLIMEY !! There's one of my 3S 2200 Blue TGY LiPo's in there. I checked my YT and last flight was : 27 May 2017 !!



Metered the pack ... 0.15 0.08 .... 0.08 ohms on the cells ... 3.78V average across them.

That's 2 years sitting unknown ..... fingers crossed it still delivers !!
I'll fly anything if I can launch it ! Youtube : solentlifeuk
Quote 3 0
Lgel
Your lipo survived because it was probably left at storage charge (around 3,8 V by cell).

I have noticed that lipos at storage charge keep their charge from year to year (I only fly in summer months), and work fine afterwards.

I must say I keep them in an ammo box when not in use, a sorry incident from a friend at the club confirmed me that it was a cheap precaution to avoid major damages to your property.

Cheers.
Quote 0 0
solentlife
I had a couple of incidents which taught me a lesson about discon LiPo once landed. 

This LiPo was disconnected all that time - so no residual drain from ESC / Rx ... 
I'll fly anything if I can launch it ! Youtube : solentlifeuk
Quote 0 0
solentlife
The Guan Li PBY Catalina the battery was found in .. I had altered engine thrust lines .. checked her out ... tested her on grass ... 

Took her flying yesterday of the grass runway - absolutely different bird to her previous ... smooth and graceful. Very happy.
I'll fly anything if I can launch it ! Youtube : solentlifeuk
Quote 3 0