GP Supercell Super Heavy Duty AAA-size batteries. These are primary (non-rechargeable) batteries with a nominal voltage of 1.5V. 

Key features and specifications:

Brand and Type: GP Supercell, Super Heavy Duty. 

Size: AAA (also known as R03). 

Voltage: 1.5 volts. 

Chemistry: Typically zinc-chloride or carbon-zinc, suitable as an economical energy source for low-drain devices such as remote controls, clocks, and flashlights. 

Environmental: Contains 0% mercury but does contain lead (Pb).