NATIONAL BH-654 Cassette Tape Demagnetizer

National BH-654 Dry Battery Cassette Demagnetizer Uses 2 National Neo Hi-Top dry cells (SUM-2(N)) We recommend National Neo Hi‑Top dry batteries. Size C (SUM‑2(N))
Misusing dry batteries can cause leakage that damages the device or even lead to rupture. Please observe the following:
Do not mix new and used batteries.
Use the same type only; do not mix different kinds (e.g., Neo Hi-Top dry cells with alkaline batteries).
Do not recharge, short-circuit, disassemble, heat, or throw batteries into fire.
Insert batteries with the correct polarity (+ and −).
Remove exhausted batteries from the device immediately and dispose of them.