When should you re-charge these batteries ?
782229
Michael, because these are Nickel Cadmium (Ni-Cd), they have a memory. In other words they remember how low their charge gets, before they are recharged, Charging them too soon, will prevent you from getting all the battery has to offer. Try to charge them when they get very low. That way you'll get the longest life from them. Keep in mind that the hotter the batteries get, the more internal damage occurs. Try not to let them get too hot. Their life cycle will be shortened. Use them, charge them, and then use them again is probably the best bet, unless you have some sophisticated temperature, current and an adjustable charger at hand. Norm Michael, because these are Nickel Cadmium (Ni-Cd), they have a memory. In other words they remember how low their charge gets, before they are recharged, Charging them too soon, will prevent you from getting all the battery has to offer. Try to charge them when they get very low. That way you'll get the longest life from them. Keep in mind that the hotter the batteries get, the more internal damage occurs. Try not to let them get too hot. Their life cycle will be shortened. Use them, charge them, and then use them again is probably the best bet, unless you have some sophisticated... » Read More Michael, because these are Nickel Cadmium (Ni-Cd), they have a memory. In other words they remember how low their charge gets, before they are recharged, Charging them too soon, will prevent you from getting all the battery has to offer. Try to charge them when they get very low. That way you'll get the longest life from them. Keep in mind that the hotter the batteries get, the more internal damage occurs. Try not to let them get too hot. Their life cycle will be shortened. Use them, charge them, and then use them again is probably the best bet, unless you have some sophisticated temperature, current and an adjustable charger at hand. Norm « Show Less
782230
Michael, because these are Nickel Cadmium (Ni-Cd), they have a memory. In other words they remember how low their charge gets, before they are recharged, Charging them too soon, will prevent you from getting all the battery has to offer. Try to charge them when they get very low. That way you'll get the longest life from them. Keep in mind that the hotter the batteries get, the more internal damage occurs. Try not to let them get too hot. Their life cycle will be shortened. Use them, charge them, and then use them again is probably the best bet, unless you have some sophisticated temperature, current and an adjustable charger at hand. Norm
782231
Get the real ones. These got so hot and were such a tight fit, they jamed inside my had held driver when they swelled from being hot. Destroyed the tool trying to get it out. I am not kidding. They might be alright if when you put them in your tool, the fit is not snug to beguine with.
1878943
What I have done in the past was to charge said batteries in another charger just to pump them up a little. Then I can use the LaCrosse charger to finish them up.
2046349
I think not using them for such a long time has killed the battery. I have left regular chargeable batteries sit for a long time and they would not charge either. I think regular use is the key.
1847629
Keep the extra batteries clean, dry and fully charged. Also, rotate the batteries for use. Why have three if you only use one. Not sure if not using them causes issues, but it can not hurt to rotate their use. Best of luck. Alan
1810334
You need to recharge them until the little green light on the charger goes out. If you use them constantly (easy to do with a trimmer) they only seem to run a short time--20 minutes or so. I haven't tested my theory, but it seems that if I give them frequent, short breaks they seem to perform longer. (I use them in trimmer, chain saws, and drill.) Of course, if they're old they may just be worn out.
502585
Remove and re- charge. We simply used replaceable alkaline batteries in our circumstances. Did not use rechargeable batteries.
2061773
Batteries could be already charged or they are old and no longer holding a charge.
1817389
As a general rule, I would try and charge the battery at least once every 30 days, but not more than 60. The longest I have let my battery be stored between uses is about two weeks, and the batteries never lost their charge. I really like these batteries as they last longer than stock batteries.
1489786
Get a Nitecore charger. Don't bother with any other charger for these batteries. Charge both of them when you get them.
1826416
New batteries are shipped with little charge. They should be charged for 4-6 hours before use
343634
I did not have this issue. Other have recommended checking to make sure you have the batteries in the charger correctly (+/-). If this does not help your issue I would contact Amazon and arrange a return/exchange since they are most likely defective. I recommend an exchange since these are otherwise decent batteries.
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
327567
Just insert the batteries into the charger OBSERVING PROPER POLARITY (battery + to charger +) and wait until the charger LED goes from red to yellow to green. When the charger LED is green, the battery is fully charged.
1847534
These batteries last about 12-14 hrs then need a recharge. Their life expectancy is approximately 9 mos give or take. Make sure your battery charger is the correct one for these types of Batteries.
2050533
Those green panos take a while to charge up anyway. but.. incase of anything being defective, check to see if the batteries are flipped in the wrong position, for any kind of overloading heat, also if the batteries were totally dead you are looking at probably 6 to 8 hours to charge all the way up. If after 8 hours and nothing something is defective.
2134902
That scenario had never happened to me. Usually takes a couple of hours to charge batteries. If the batteries are not fully charged, try discharging and after that the charge will automatically start.
1153206
you can charge them as much as you want they don't acquire a 'memory' but as soon as the fully charged light comes on remove from charger they can be damaged by being left on charge they don't seem to discharge just lying around the mah hours on these batteries are greatly overstated