A depleted battery takes 6-8 hours. The charger light will be red (charging) and turn green (trickle charge). Crucially: The manual says you can leave it on trickle for 2 hours, but not for 48 hours. Over-trickling can swell the battery casing.
Model: Quingo Air 1
Type: Class 2 Portable Mobility Scooter
Maximum User Weight: 135 kg (21 stone)
Maximum Range: Up to 18 km (11 miles)
Maximum Speed: 6.4 km/h (4 mph) – pedestrian pavement legal quingo air 1 user manual
The "Air" in Quingo Air 1 refers to air travel compliance. You must fold the scooter to fit in a car trunk or overhead bin. A depleted battery takes 6-8 hours
Folding for travel (30 seconds):
Airline specific instructions (Per Quingo manual): Model: Quingo Air 1 Type: Class 2 Portable