Is it ok to leave a ion battery on a power tool battery.

I've seen a lot of different answers to this question over the past few years.I used to do it with my old sawzall battery.I only get 15 minutes of run time a year down the road, and I'm pretty sure that's what ruined the batteries.

I have 3 batteries that are all at 50% charge.Do you charge them and then take them off at some point tomorrow, or do you leave them for a few hours and come back later in the day??

The nicad battery memory is missing from the smart chargers.I left the battery on the charge.

I don't stress about them because I take them off as soon as I see they're done.I have left them overnight many times.Modern battery controllers.The old stem packs were more sensitive.

Sometimes I leave batteries on a charger for a few days and don't think about it, but I keep them off the charger once they charge.

Agreed with that.Several fires have been attributed to tool chargers.Every once in a while I forget but the mental lashing I give myself keeps me straight.My biggest concern is fire, and most of the Chargers now have conditioners in them to protect the circuitry in a battery so we don't kill our tools.

The old batteries had 15 minutes of run time.Someday, the Milwaukee batteries will do the same thing.The charge had nothing to do with it.The performance of batteries gets worse as they age.If you don't use them for a long time, store them at 50% full and you can help them along.

The old chargers were a power supply.There was no feedback from the battery.Most of the stuff you had to remember in the past for the constant current and constant voltage charging has been implemented into the charger.If the battery overheated, you had to decide when it was cool enough to charge.Some people think the charger will cool it before it starts charging.

I've heard that people don't like to charge the battery unless it's full.I charged it because it was at 2 of the 4 led's.Is that bad?I don't know if I should be running them completely down.

They should not be run to empty.They should be stored at 50%.Don't charge them hot.It can be bad to freeze.

It doesn't matter if you leave it on the charge or not, it needs a controller to handle charging.If you don't want to worry about the battery draining quickly, it's better to remove it from the charger than it is to leave it there.It's a bad idea to leave the batteries on a tool when they're nearly empty.The battery should be removed if a tool goes into shutdown mode.I'm not sure if it's necessary to deplete them to near zero once a month to condition them.

It's really bad to leave a dead battery on a tool because the battery is made up of a bunch of cells.Some of the cells are a little weaker and have a slightly lower voltage.The controller on the pack will refuse to charge the whole pack if a single cell's voltage drops too low.It's dangerous to leave a pack on a tool, as it discharges slowly over time the weakest cell might start to drop to or below the safe voltage threshold and when you go to pull thetrigger it might do the cell in taking the whole pack out.If you don't leave packs on your tools, it is possible to take the pack apart and find the bad cell, but only if you have a voltage meter.

Isn't it bad to leave the batteries on the tools?I think a lot of others do as well.The fuel drill and driver have a battery.They are able to stand on my bench.

When the batteries are nearly dead, it's a bad habit to leave them on a tool.The controller in most modern tools will prevent you from overheating the battery and shut power down when the voltage drops too low in the pack, an old pack can wear out over time and become irrecoverable.Some tools drain packs more than others.I think we had a discussion about a while back where a die grinder could deplete a large pack in a matter of weeks just sitting on the shelf.

There are some things you can do to prolong the life of your batteries, but if you do nothing special and just use the batteries how you will without thinking about them, it will almost certainly be fine.There's only so much the battery protection circuit can do if you try to kill it.It's harder for the battery to protect itself if you drain the batteries completely before charging, try to heat or cool them, or anything else special.If you leave them off the tool, you're not likely to waste a spare pack on a tool you never use so it's unlikely to be a problem.Unless you put away a dead battery on the tool, it's not a big problem.I leave the battery in the slides, but not locked in to the tool, for safety, and it doesn't discharge or cause any problems.

I don't care if the light turns green or not, I just grab the battery when I see it.I always charge my batteries.I never leave them out in the cold overnight because I wouldn't want to be there.

The charging station has a manual timer on one outlet.I forget about them until I need them.

The charging station has a manual timer on one outlet.I forget about them until I need them.

I'm not sure if it's better to leave the battery hooked up to a charger or not.The battery contacts might cause an extra discharge.As soon as it's plugged in, I'd let the battery and charger do their work.I think people get bent out of shape because of old school dumb chargers that cause problems with different chemistry batteries that don't apply today.These batteries are smarter than you or I and know what they're doing.Things can happen even if you do everything right, because a lot of energy is stored in a small space and any electrical device could potentially be a hazard.

I would love to throw a timer in one of the two gang boxes next to the receptacle.

I leave mine on the charge all the time.Modern batteries with all the electronics they have aren't as much of a risk of overheating or overcharging like the old Ni-Cad or early lithium ion ones were.

You should charge them before using them.The batteries are in "Sleep mode" when shipped so if they sit on the shelf for a long time, they don't die.I'm not sure if that is true or a myth.It's always a good idea to charge them before using them.Sometimes I forget they are charging and leave mine on the charge for weeks at a time.The batteries are smart and won't damage them.

Milwaukee batteries are smart enough to not worry about charging habits like they used to.I have batteries that have sat for long periods of time and others that haven't been charged in weeks and have no difference in performance or logivity.

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