GP Super Alkaline AAAA Batteries.
Battery Type: Alkaline.
Size: AAAA (also known as 25A, MN2500, or LR61).
Voltage: 1.5 Volts.
Usage: Ideal for small devices like digital pens, laser pointers, and LED penlights.
Note: The packaging shown indicates a best-before date of January 2011, meaning these specific batteries are likely expired.