I mostly fly 2meter pattern with 4Stroke YS engines although have a significant selection of scale and other pattern planes mostly gas but also a selection of electric planes.
you can safely get up to 300 charges for each battery but 250 to play it safe even more as you get a warning at 200. It all depends but 5 is about right. Leaving them fully charged for more than 24 hours isn't good as the auto discharge to...