Reply by Steve Peterson

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Posted on Leaving Batteries on Charger

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Steve Peterson

411 posts in 3619 days

#1 posted 08-08-2017 11:51 PM

One thing to keep in mind is that all Li-ion batteries must have a smart charger to prevent then from overcharging. It should be safe to leave these batteries in the charger, since it will go into standby mode after the charge cycle is complete. A few posters have mentioned to not take the battery out of the charger and immediately start using it in the tool. The risk here is only when the battery is still warm from charging, but it will cool down after the charge cycle is complete.

All of the information above is completely wrong in regards to the older Ni-cad batteries. Their lifetime will be significantly reduced if left in most chargers. They probably also should cool down after removing them from the charger and before using them in the tool.

-- Steve

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