Rob_T Elite Veteran Location: Tualatin, OR - USA
| More than long enough 
There is no noticeable loss of charge in a month. I have actually left lipos fully charged for 6 months and they were still fully charged. But please do a search on "lipo storage" to see why my first answer is actually the best.
Here's 2 links to some further reading http://www.runryder.com/helicopter/...ipo+AND+storage
http://www.google.com/custom?cof=LW...ch=runryder.com
Rob Eco8, Piccolo Fun, Shogun, HB Elite CP, Trex 450XL CDE, Swift |