What is the capacity of 6-cell battery

What the hobby/RC world calls a “6S” battery is six lithium-ion (typically Lithium Polymer, or “LiPo”) cells, wired in Series, then packaged together with a 7-pin balance charging connector that allows a charger to sense/charge each cell individually, along with a fat 2-pin connector (often XT60 format) that delivers the series output of the battery [...]