The MH-25a is a battery charger designed specifically for recharging Nikon EN-EL15/EN-EL15a Lithium-ion batteries. The EN-EL15c is a Rechargeable Lithium-ion battery for use with select Nikon cameras. It can be charged using either the MH-25a battery charger or the EH-7P charging AC adapter when used with Nikon cameras that have the capability to charge batteries in-camera. used a few times and holds a good long charge.