Replacement battery for SpectroDens SpectroPlate. Specifications: 2000mAh, 4.8V, Ni-MH. Compatible with: SpectroDens SpectroPlate, Spectrodens D-61. Replaces: Techkon 75119 504 521. Techkon replacement battery designed for Equipment/Survey/Test Charger devices. Tested for reliability and long service life.