I wanted to share what I've been doing for harm reduction, since i pretty much have to charge my scooter indoors.

I bought a $10 countdown timer outlet that plugs into the wall. If i want to charge the scooter to 100% i set it to 6 hours or so.

Scootbatt recently came out with an app estimate that does two helpful things:

1. Gives an estimate for how a charge up to 80% will take
2. Notifies your phone when the scooter reaches 80%

I use these features to charge until 80% and then de-energize the charger, unless i am going to need 100% charge that day.