Can I leave the two batteries in the charger for pro-long periods of time...or will it overcharge (and hurt) the batteries if left in for several days
1671929
I have 2 sets of batteries. When one set is in my device, the other set is in the charger. I have not noticed any impairment to the batteries when left in the charger for several weeks at a stretch.
1671930
We have used these batteries for the last 25 years. We have two sets. My wife uses them for a Black and Decker 2 speed small vacuum sweeper that has not been made for over 20 years. She uses one set in the sweeper every morning the master bath. I have replaced the batteries once in all that time and one sits in the charger until the other set runs down. Simple answer is that it will not hurt the batteries to stay in the charger for a prolonged time.
1671931
I've never had this kind of problem and There were times when I left the batteries in the charger overnight without any damage to them,they were warm but worked fine.
1671932
I have accidentally left these batteries in their charger overnight and maybe for a day, with no noticeable negative effects.
1671933
If the batteries are NiCads then it depends on the charger. If the charger senses when the batteries are fully charged and then ceases charging it will be okay to leave the batteries in the charger. If that is not the type of charger you have than do not leave the batteries in it after they are charged. NiCad batteries need to be exercized. So make sure they are run down almost completely before charging or they will develop a "charge memory" that will make them less efficient. If the batteries are Lithium than you may leave them in a charger or in the device they are used in. They do not lose their charge like NiCads and they do not develop a "charge memory". I hope this helps. If the batteries are NiCads then it depends on the charger. If the charger senses when the batteries are fully charged and then ceases charging it will be okay to leave the batteries in the charger. If that is not the type of charger you have than do not leave the batteries in it after they are charged. NiCad batteries need to be exercized. So make sure they are run down almost completely before charging or they will develop a "charge memory" that will make them less efficient. If the batteries are Lithium than you may leave them in a charger or in the device they are used in.... » Read More If the batteries are NiCads then it depends on the charger. If the charger senses when the batteries are fully charged and then ceases charging it will be okay to leave the batteries in the charger. If that is not the type of charger you have than do not leave the batteries in it after they are charged. NiCad batteries need to be exercized. So make sure they are run down almost completely before charging or they will develop a "charge memory" that will make them less efficient. If the batteries are Lithium than you may leave them in a charger or in the device they are used in. They do not lose their charge like NiCads and they do not develop a "charge memory". I hope this helps. « Show Less
1671934
I leave mine in the charger all the time, just swapping them for the ones in use as needed.
395235
It will not overcharge, but I have felt for decades that rechargable batteries last longer if allowed to cycle through some discharge and then recharge. The Dorcy will get warm when plugged in and my fear of a fire, if unattended, is large.
408918
I never thought about this. I keep my batteries charging all the time. I haven't noticed a problem. Yet, that is. Christine S may have a good suggestion.
1290308
I charge mine over night and then use till it starts to slow down then over night again. I have forgotten about them in the charger for about three days, they were hot, and over the years it seems to shorten the life of the battery. so 8 or 10 hours for full charge.
238565
No to the first two questions and it depends on the "conditioning" or intent on the purpose of the batteries in answering your last question.Look up the product's manual on line which I did to understand the options on charging batteries to maximize battery life. Please note every option has it own specific time to accomplish its task. The manual will explain. Inaddition, the longer the charger charges, given the task, the batteries-not the charger- will get hot! ALLOW IT TO COMPLETE ITS JOB! You'll be okay.I hope this will help. Good luck!
35131
You can leave batteries in the charger. I try not to make a habit of it because I'm not sure how it affects the life of the batteries. If you leave them in, at least you can be assured they will be ready for use.
2209302
yes but if you leave it plugged in all the time i dont know if it will overcharge an damage and damage batteries.hope that helps
1227799
yea it will be fine to leave it plugged in and the batteries in. they are lithium ion type batteries the same kind in laptops and cell phones. so they will charge up then the charger will just keep them charged till your ready to use them, i dont know about long term though like over a week or two probably wouldnt be great for them.
408919
I keep one battery on the charger at all times, and switch them once every other day or so. As long as the battery will not be sitting there for several weeks, it will be fine.
2050537
as far as I know the charger works like a car charger or trickle charger. My batteries usually charge within 3 hours. But the design is meant so your batteries will not be over charged and will not be liable to explode or rupture. It's strictly a safety factor built within the device. The size of the battery matters as well. Hope this helped!
1035281
I read somewhere you shouldn't leave the batteries and a charger. I have for tools now that run on those batteries. I use them in a commercial capacity And have for 5 years.
1106915
With the old style charger this type uses, I would think not. However, I have a power strip with a timer I use on all my chargers. I have it set for about an hours charge each day. This way everything is charged and ready to go with no over charging. Seems to work well for me and some batteries are several years old.
156881
Nothing special about charging. I just put mine on the charger while I sleep. It's always worked for me and doesn't hurt the battery to be on the charger for seven hours.
1570397
I disassembled an old unit that failed to charge after a year or so and removed the batteries. They would not charge with a "hobby" charger designed for electric RC cars and such. I then discovered that storing the unit in the charger when it is plugged in was overcharging the batteries. I have another unit about 4-5 years old that is still going strong. I charge the batteries overnight when they will no longer last a full brushing cycle. NiCad and NiMH batteries have a very limited life when charged to 100% capacity repeatedly.
1420344
There is no need to worry about charging time. Just insert the battery into the charging station and when the battery is fully charged the chargingstops. There is no harm done by leaving the battery in the charging station indefinitely
940252
I have a couple batteries that don't hold a charge long so I leave them in the charger and they usually get the job done before they lose the charge again. I always keep one in the charger.
151317
The instructions say "You cannot overcharge this unit using the AC charging method." However, elsewhere in the manual it says "overcharging will reduce battery life." But if you charge it DC you should not exceed 6 hours of charging time.