IQ NIMH-001 Optex iVision Wireless Intercom battery replacement VD-8810, H-AAAj3 IQ NIMH-001 Optex iVision Wireless Intercom battery replacement VD-8810, H-AAAj3 3.6Volts / 750mAh Battery Battery for Optex iVision Wireless Two-Way Intercom System. Manufactured in North America with High Standards. Ships Immediately.