does this unit discharges the batteries fully before charging? what if one battery is good and other one bad how would it charge?
1475401
Define bad and good for me please? If you mean one is charged and other one isn't. If you put both in it will only charge the battery thats out of juice.
469843
If the internal battery is drained then unit will not work correctly until the internal battery has some charge. I have tried to plug the unit in to the usb charger after the battery drained but then had to wait some time for the battery to charge before it would work right. I suppose as long as you keep it plugged in to a usb charger all the time then the battery will stay charged and so should work.
2247102
Sounds like you could have a bad battery if it's only at 10.9v. (One bad cell?) What percentage charged does the unit show when first turned on? The voltage of the charger should initially go to ~14v-15v when first turned on. Can you test the charger on a known good battery?
632959
No battery is fully charged, unless you buy it at a store, have them charge it overnight and pick it up the next day. This battery is a good one for the money in my opinion and should last a long time, but time will tell as I have only had it five months. And No it was not fully charged and I would say it was so discharged on arrival that waiting to recharge it much longer may have already shortened its life. Buy a CTek 3300 battery charger they are the best and has made some of my batteries I have last 10 years.
1622703
I would immediately send it back. It has to be defective. My two batteries work just fine. They take the charge and hold it until you are ready to use them. Sorry to hear you had trouble. These are hi-tech units and I do suppose that they are a little temperamental.
1108738
The charger is identifying whether the batteries are appropriate. It should begin charging in a steady light if the batteries are deemed appropriate. It will not charge just any battery.
1961458
Without knowing the state of your battery it would be hard to say. Try the recondition button to see if you can get the battery to work, press the large button until recond light is lit. It takes a while to recondition the battery. Modern battery chargers will not charge bad batteries. If you started with a dead battery, then recondition may help. If the battery was okay then you have a bad unit. I would try it on a good battery before sending it back
633481
You're charging it wrong. Let the battery run out completely before recharging it. NiMH batteries act just like NiCd batteries in that they like to be discharged, then charged.
1491309
Most likely you have to charge the new battery first before you can use it. These type of rechargeable slowly discharge themselves even if it is not used. The fully charged battery usually depletes in several months. The new battery may or may not have some charge left, depending how long it has been on the shelf. Also, it is recommended to fully charge the new battery before the first use.
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.
224261
That is perfectly OK. My battery has four contact points. The two on the product are for a positive and a negative contact point. In order to charge any battery this is all it needs. The light on the charger will turn red to indicate that they are on the correct points and is now charging. It will turn blue when your battery is fully charged.
489312
Battery came partially charged.... you should probably charge it completely before using it....
775653
Yes it may have some level of charge, I would let it discharge completely and then fully charge it. Better safe then sorry. Some batteries develop a "Memory" charge and they do not retain a full long life memory. Please "Goggle" the term memory charge regarding batteries for a complete understanding.
805868
My new battery was already charged and I used it right away. Then when I loose a bar I charge it about 20 min. when the battery light stops flashing which indicates the battery is fully charged.
213918
I failed to fully charge batteries before I started using it and it of course quit working. I went to battery place to try to find the batteries or see if they would even take a charge. They wouldn't at the store but when I tried them again on the charger that was provided, they charged up again. It is now working again.
463306
If the battery already has a full charge the tester will show it in a short while. Yes, it will sharge partially discharged batteries.
1030144
I refresh at every charge. All it does is drain the battery all the way before it charges. And that is the best way to make batteries last. But there's nothing wrong with just charging up if you need them quickly