Is it ok to leave the batteries in the charger? Or will that degrade the batteries over time.
1845525
I am not sure about this, but for the safe side remove the batteries from the charger any batteries not only the these batteries in case of over charge and damaged your batteries.
1845526
I was worried about the same thing. Forgot about them once and they charged from early evening until lunchtime the next day. No apparent problems.
1983804
Store your batteries fully charged. Also, try to avoid letting lithium ion batteries (like the ones in cell phones) discharge completely after the initial 4-5 cycle "break in" period.. Repeatedly draining them all the way can shorten battery life. Most battery chargers have a protection circuit built in so leaving a battery in the charger past the time it is fully charged will not harm it.
2244647
You should never leave a battery in a charger unattended. There is always a slim chance of a battery or charger going bad, violently.
940249
There should be no harm, I have had no issues with leaving it on the charger after reaching 100% and have not heard of any problems. That said, I have but don't normally leave it on the charger for extended periods out of habit, not concern for the batteries condition.
1027029
Yes, just be very careful that you put them in correctly. Otherwise, any remaining charge in the battery will melt the charger.
1557739
You can leave it on charge for as long as you want if the charger is not malfunctioning - the batteries stop charging once the light turns green. Lithium batteries last the longest when they are kept charged. YOu don't need to cycle the batteries through charge discharge cycles - if anything - this is more harmful to the life of the battery. The charger will cut off and the light turns green once the batteries are fully charged. IF it didn't, the batteries have the potential to explode or catch fire.
1261065
I leave the batteries charging all the time, except when I'm using the trimmer of course, because they take so long to charge. Have been doing this with two batteries for a year or so and they still seem to be holding a good charge.
51070
According to the instructions, it is ok to leave the battery in the charger after the battery has reached full charge. It has been my experience with DeWalt products that no harm has been done if you don't remove the battery from the charger until you ready to use it.
1227795
Yes, you can. I've tested the charger while connected to a Watt's Up power analyzer, and once the batteries reach a near-full charge, the amperage the charger pulls in begins to lower. Once the batteries are fully charged, the power analyzer shows 0A of current flowing between the wall adapter and the charging base, meaning the batteries are no longer drawing a charge and thereof are not overcharging. You'll be fine leaving them plugged in, though I wouldn't keep them plugged in for days on end just because you don't need them to trickle charge and lithium batteries have a very slow self-discharge when being stored between uses.
1410190
No - according to the back of the original package, only Ni-MH batteries should be used in the charger. I hope this helps!
1983802
I always kept mine fully charge and in my purse for backup. The batteries will be fine, I used mine for a year like this until I got a new phone. The batteries are still in great condition. The true worry comes from leaving them on the charger to long it cause the battery to get hot and expand which makes them go bad much faster.
1254089
I am not sure it is wise to keep batteries on charge all the time. I always disconnect the charger after a full charge.
719379
I've used these batteries for over a year and they've never gotten hot when left in the charger for extended periods. On my charger, the light turns green. I also charge AA and AAA batteries and they do seem to get very hot, so, in short, I believe the 18650s are safe, but that's just my opinion based on my experiences.
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.
2156342
have the same thing but not the same problem. They unfortunately (charger) do wear out from repeated use. Not that well made but usually work fine for quite a few charges. Don't know why it won't charge all your batteries as mine only cares if it is the right kind no matter who makes it. It could be the battery is bad if your charger works on other batteries.
1723614
I leave the unit in the charger when not in use and have never had issues with battery life.
1286583
Black & Decker says that these batteries can be left on their chargers indefinitely without overcharging. I don't know what would happen if you used a different charger.