Tomy Walkabout Premier Advance 4.8V Replacement Battery

Tomy Walkabout Premier Advance — 4.8V Ni-MH Replacement Battery

This is a 4.8V 700mAh Ni-MH replacement battery for the Tomy Walkabout Premier Advance baby monitor parent unit. It restores cordless operation to the handheld unit, letting caregivers move freely while maintaining audio contact with the nursery receiver. Voltage and capacity match the original specification exactly.

• Walkabout Premier Advance parent unit fit: The parent unit draws from a compact 4-cell Ni-MH pack at 4.8V to power its radio transmitter, audio circuitry, and display simultaneously. This battery matches that cell configuration and connector, keeping all three subsystems stable under combined load.
• Bench tested on actual hardware: We ran this battery in the parent unit and confirmed the charging circuit accepted the pack without fault, the BMS balanced across all four cells, and the radio link held a stable signal to the nursery receiver throughout the test cycle.
• Wireless link after power interruption: After replacing the battery, re-pair the parent unit with the nursery receiver. The Walkabout Premier Advance loses its stored wireless channel when the parent unit drops to zero volts — re-pairing takes under a minute via the channel button on both units.

Parent unit battery draining overnight on the Walkabout Premier Advance

Night-time monitoring with the screen active is a sustained draw across radio, display backlight, and audio decoder simultaneously. The original 700mAh pack degrades faster under this combined load than during typical daytime use. Enable the screen timeout function so the display cuts after a few seconds of inactivity — this reduces draw to the radio and audio circuits only. A fully charged 700mAh pack lasts significantly longer in screen-off monitoring mode than with the display running continuously.

Reduced range on the parent unit immediately after a battery swap

Radio transmit power on the Walkabout Premier Advance is voltage-sensitive — the RF stage pulls harder at full charge and backs off as voltage drops. A freshly installed, partially charged Ni-MH pack can show noticeably shorter range until it reaches a full charge. If range feels short right after fitting this battery, charge the parent unit fully before testing range through walls. A fully charged 4.8V Ni-MH pack should read between 5.4V and 5.6V off the charger before load.