I keep the batteries in the tool and have a 6 pack charger with fresh batteries. I check the battery in the tool when I grab it for use and put it away. Swapping them accordingly.
I always keep one charged (with the tool), for the spares it depends on if I will need them during the project. If I will not need them for the project, I hold off on charging until I get close to starting the next project.
Not a great idea to leave them on the charger, yes the modern chargers and batteries have logic to prevent overcharge, but it doesn't always work correctly if they battery is left on the charger continually.
The ideal storage level is around 50% of charge to get the longest life out of the batteries.
All my Milwaukee stuff i just leave it in the tool, or in the drawer, i have some batteries that are probably close to 10 years old now. Still seem to work fine.
Don’t trust batteries enough to leave them unattended, charging for long periods of time. Several garage fires started at Havasu due to battery chargers and exploding batteries.
I'm religious about bringing the batteries back inside when I'm done with them so they don't bake in the garage, don't always have them charging though. Have one of these on my christmas list to help with organization
Although I haven’t been practicing it, I agree 100% they shouldn’t be left on the charger as others have said. With that said mine are in my top box with the lid closed and nothing else in it that could really burn imo. Maybe I’m wrong, and hopefully I never find out.
I’m also completely different with my rc cars and charge the batteries in a lipo fire bag.
Now I’ll probably start pulling the batteries off lol
I leave mine in the charger. Charger is in a smart plug. Manually, it's 90 minutes. Or I can turn the plug on with my phone. Off for that matter too. In case I forget, which happens. Just one battery at a time, the other two are usually charged, or in use.