Handy for those of us with hobby chargers.
And prior to this these things have been difficult and/or expensive to find.
Single cell holder
http://www.dealextreme.com/p/3-7v-1-x-18650-battery-holder-case-box-with-leads-100999
Twin cell holder
http://www.dealextreme.com/p/7-4v-2-x-18650-battery-holder-case-box-with-leads-100997
Triple cell holder
http://www.dealextreme.com/p/11-1v-3-x-18650-battery-holder-case-box-with-leads-100996
It ought to be easy enough to hook up a balance harness to these if desired.