Note that new Nikon models cannot take after-market batteries.
Lithium-ion batteries have a low self discharge rate so a fully battery will retain its charge even after stored for a long period of time. It also does not have a memory effect and can be recharged at any time. It is not required to fully cycle the battery and a full discharge is not recommended. Simply use and recharge when your DSLR's battery meter reads low.
The EN-EL15 battery fits the Nikon D750, D600, D610, D7000, D7100, D800, D800e, D810 and Nikon 1 V1 + more.