Hi Todd, long time!

Most lipo instructions I've read tell you to store lipos around 50% charge. I know this is not very scientific, but this is what I do: After my last practice or race, I simply store the battery and car.

I know that a race will take about 1700-2000 mah out of my battery so for a 5000 mah so that's roughly 40%. I'll leave the battery that way until the next practice or race, either charging the night before or day of. I've never had a problem with this method.

Hope it helps!