Audio Guidie Personalguide PGI/AV Compatible Battery 3.7V 1100mAh

Audio Guidie Personalguide PGI/AV & III Audioguides — 3.7V Li-ion Replacement Battery

This is a 3.7V, 1100mAh Li-ion cell for the Audio Guidie Personalguide PGI/AV and Personalguide III handheld audioguide systems. These devices are used in museums, galleries, and attractions to deliver audio commentary to visitors. When the original cell degrades, this replacement restores full power to the unit.

• PGI/AV and Personalguide III shared battery platform: Both models run from the same 3.7V single-cell Li-ion pack at the same physical footprint — 52.00 × 33.87 × 5.26mm. The BMS voltage thresholds and connector pinout are identical across the two, so one cell covers both units.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on audioguide-class loads. The BMS engaged cutoff correctly at both ends — no undervoltage passthrough and no overcharge drift observed.
• First-charge protocol for audioguide units: Audioguide docking cradles draw charge current through the unit's internal charge circuit. If the replacement cell arrives at low state of charge, seat it in the dock for a full charge cycle before powering the device on — the boot sequence requires minimum voltage to initialise the audio playback firmware correctly.

Personalguide not booting after new battery installation

The Personalguide's firmware initialisation sequence pulls a short high-current burst at startup to load the audio index from flash. If the replacement cell is below roughly 3.5V at installation, that burst triggers the BMS undervoltage protection and the unit shuts off before the boot screen appears. The unit isn't faulty — it simply lacks enough voltage to complete the startup draw. Place it in the docking cradle for at least one full charge cycle, then power on. If the cradle indicator light doesn't respond, check cradle contact pins for oxidation before assuming the battery is at fault.

Audioguide unit draining faster than expected between visitor sessions

Personalguide units left powered on between sessions continue drawing current through the audio controller and display backlight even when idle. A degraded original cell accelerates this pattern, but a fresh 1100mAh cell can still deplete quickly if units are not docked between tours. Check whether the fleet management cradles are making reliable contact — poor dock seating means cells charge partially and start each session below full capacity. Confirm each unit reads at or above 4.1V before distributing to visitors.