How long should you leave them in the charger?
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.
1290309
Typically overnight is adequate. I think leaving on charge for more that 2-3 days shortens battery-use life over time.
1290310
These batteries power a Dust Buster whose normal storage place is in a charging cradle mounted to my shop wall. Thus, my batteries are always charging.
421588
Ditto the 11/30/2014 comment, no need to leave them on once they are charged; I usually remove them once I see they're charged.
958987
Yes you can leave it in the charger when not using. I had some problems charging in my garage when the temperatures were above 90 degrees, the red light flashes on the charger. I had to bring the charger inside the house and let it cool down before the green light would flash and it would charge. It takes about 5 hours to charge completely.
958989
Leave it in the charger as long as you want and it won't hurt the battery. It takes about 9 hours to fully charge. Therefore, I suggest you have two batteries.
61599
Either or, you can take them out of the charger, leave them in the charger, leave it plugged, etc. the charger shuts off to stop the batteries from over charging when the light turns green.
1524535
Yajvendra, I can't give a good answer. I place batteries of different states of discharge in the charger and go about my business. When I get home a 4-5 hours later, they're charged. I don't know at what point they've each reached their charged state.
707191
I am sorry, but I do not know the answer to this question. I normally put them on the charger and put other batteries in the unit the batteries were removed from. I put the discharged batteries in my charger, two or four at a time, plug it in and go about my activities. When they are charged the charger light turns off and I remove the charged batteries when I notice they are charged. Usually it will be the next morning or in the evening. It is not uncommon for batteries to be in the charger for eight to 12 hours. Tom Kerr
770417
It depends on which charger you use. A range would be 2-8 hours. I don't wait for the batteries to be fully drained. It doesn't harm these batteries to be recharged if you notice that your flash light is not as bright as it was after a recharge.
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.
1928349
I am getting about 10-12 minutes per battery, but I charge them and then they sit for a week. You may get more time if you charge the batteries 12-24 hours before using them. Also keep them in the house if you live in a hot climate. Storage temperature may affect battery life. B&D; also claims the batteries reach full potential after 5-6 charges, but there is no empirical evidence of that.
1744616
Make sure you wait 15 minutes after using your battery before you charge it. If you charge it right after you use it they won't last long. You have to let them cool down.
356198
I have left mine overnight and did not notice any problem. I think it would be best, however, to remove them promptly after they are fully charged.
297027
It's OK to leave them in. I have the Nitecore quad charger and I find that the blue power on light is too bright when I'm at my desk so I unplug the charger and leave the batteries in. I charge both Nitecore Lithium and Eneloop AA & AAA. Goodbye Alkaline. (I use Panasonic D & C adapters.)
1153210
Recharge these anytime. In fact, best to NOT let these run down entirely, as these (unlike Ni-Cad) have no 'memory.'Mainly don't overcharge. These take about a 2 hour charge, and overcharging in an attempt to bring them up to full capacity cause battery 'stress.' You can get the full, more scientific answers to your questions if you Google. Also, remove from charger after charging.
1035282
Lithium batteries hold their charge for months. You do not need to leave it on the charger. This battery size will recharge within 15 minutes. The charger is smart, it will not attempt to continuously charge it when it does not need to. Leaving it on the charger will not hurt, but due to possible liability they tell you not to, since product failure with this much power potential can start a fire (very unlikely, but possible).
2109729
Like everything else, the chargers have a life span. But it's quite long. I have 4 of them and have used them constantly for three years. They're still working fine. Just make sure you recharge them when they are depleted. And don't use them until they are completely dead. When they start getting weak, exchange them for a freshly charged battery, and put the depleted one on the charger. If you use any rechargeable battery until it's totally dead, you will shorten their live span.
577747
From my experience I wouldn't attempt to go over an hour. I had three batteries charged and ready at all times. When one would get low I would change it and put the used one on the charger. If you are shooting continuously go AC if you can't use AC keep an eye on your battery level. I hope this is helpful.