Quasar SP-3235 Operating Instructions Manual page 10

Use two AA batteries:
Remove battery cover by pushing in and up near arrow.
Install batteries matching (+) and (-) polarity signs.
Replace the battery cover.
• Replace batteries in pairs.
• Do not mix battery types (zinc carbon with alkaline).
• Do not recharge, heat, short-circuit, disassemble, or burn batteries.
Incorrect installation can cause battery leakage and corrosion that will damage the Remote Control.