A shaft-shaped battery recess simplifies insertion and secure retention in portable electrical measuring instruments without increasing size.
A compressible first molding layer creates swelling space around a wearable battery, preventing deformation and improving long-term reliability.
A shaft-like battery recess combines guidance, electrical contact, and locking to keep portable meters compact and securely powered.
A reversible male-female coupler lets one power unit connect utility modules and transport devices while supplying power to rechargeable batteries.
A rigid-flexible battery closure lets mobile devices absorb battery swelling without extra internal space, while keeping the cell secure and protected.