Do you leave lithium ion batteries charging?

The last time this topic was discussed was in 2013, and there might have been advancements since then.

I primarily own Ryobi tools, but I also have some Milwaukee ones.

- Ryobi chargers come with a Maintenance mode.
- Ryobi vacuums seem to require the battery to be in and charging 24/7 using the wall-mounted chargers.

So, do you leave your batteries on the charger?

If you do, there's likely some loss in the battery’s overall life, but it might be negligible and worth the convenience.

I own two vacuums, which means I can keep at least two batteries charged and ready at all times, even without using additional chargers. I'm considering using some of my other chargers to keep more batteries charged, although it might not be necessary. For larger jobs, I could always charge the batteries in advance.

This situation doesn’t apply to my M12/M18 tools since I don’t have any vacuums for them. So I need to decide whether to keep those batteries charged or not.

Any thoughts?

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Additional reading:
Dead Dewalt Ni-Cad battery -- Can LiIon work?

I appreciate the increasing availability of battery-powered tools, including yard tools. I find my 18v Ryobi trimmer to be excellent. Gas-powered trimmers have always been tricky, requiring the perfect mixture and feeling inefficient, not to mention the pollution they cause. With electric tools, you just insert the battery, press the trigger, and start working.

I also have an 18v chainsaw, which operates under the same principle. If I needed a saw for more heavy-duty tasks in remote areas, I’d opt for a higher voltage model that lasts longer and requires less frequent battery swaps.

When cutting a large tree with my chainsaw, frequent battery swaps were necessary, which can be inconvenient when you're up in a tree. If I were doing this regularly, I might use a pouch or backpack to carry extra batteries. I've also developed a routine of keeping batteries charged and always taking a fully charged one before embarking on complex tasks. Even off-grid, electric tools are advantageous as they eliminate the need for gas. Although I'm not currently off-grid, I plan to buy off-grid property, so these considerations are always on my mind.

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