Kinetic is not ordinary battery quartz
The rotor drives a generator rather than winding a mechanical mainspring. That distinction changes both troubleshooting and parts.
Low reserve can have more than one cause
A tired energy-storage cell, charging-system problem or excess movement load can all reduce useful running time.
Do not install a normal disposable cell
The movement is designed around rechargeable energy storage. Correct parts and diagnosis matter.
Reference and caliber are especially helpful
Seiko Kinetic spans multiple generations. Send the caseback and caliber information if visible.