Had a 2100Ah 7.4v 2 cell Lipo and one cell puffed up and started to leak so I carefully seperated the two cells, is the good cell of any use and if so could it be used for powering receivers in gliders etc? will it power the receiver and two or three micro servo?. how do you charge a single cell?,

It looks fine with no damage as it has never been flown, seems a shame to chuck a good cell away if it is useable,

                      regards,          Terry

One single cell will be a bit low for servo operation - you could try it in something very small and dispensable, but I expect your receiver may object to such a low voltage

Most decent chargers allow you to set up for 1 cell.