I bought this battery and it only charges to 98 percent. Why?
836493
You may simply need to recalibrate the battery charging on the macbook. If you were using an old battery, and then switched to a new one, the charge percentages may not be accurate. If you google battery calibration macbook you will get some helpful information on how to do it.
836494
Honestly all of the batteries are not the best. PLus if you are running any programs it wont charge to %100. Just plug in while you are not using it get the %100
836495
Because it's cheap garbage and shouldn't even be sold on here. My computer stays on for about 3 minutes not plugged in with this new battery even when it's charged 100%. THe battery icon on my computer says "Service Battery". It' garbage.
1252352
The battery that I installed in my phone was fully charged in about 4 hours. If the battery that you recieved won't charge you might have got a defective one. I would try cleaning the contacts on the battery and your phone and then try to charge it again. If that dosen't work then you will have to return it for replacement. I hope that answers your questions.
1317492
It's a 9 volt battery so when it's fully charged the voltage should be 9 volts.
937914
Where did 69% come from? Units I purchased is only charging up to 18% (EIGHTEEN PERCENT).
2028840
The battery fits perfectly, however, it is not holding it's charge. What should I do?
317968
How do I find out what is wrong with this battery? I did not know that you aren't supposed to use the regular battery tenders on these kind of batteries and I left it charging for a couple of days and now it is beyond dead. So if the tender didn't kill it, apparently (also read just now in the questions section) if it drops below 8% charge it is no longer anything but a paperweight? So tell me now if I should just go out and buy a new battery after wasting my money on the 1 ride I got out of this battery.
793548
If I remember correctly, mine was only partially charged when I got it. Sorry I couldn't be more precise.
249393
I had the same problem. I went to another site and got a better battery for half the price. Still no response about my refund. Good luck
1637764
If charging circuit is non-operational, the old battery may be OK. try returning the battery and request replacement. if charging problem still exists, the charging circuit may be the culprit.
215440
could be a bad battery (even though it is new) or the transformer that suppose to charge it is bad. use a multi meter set to volts dc and put the red probe on the red terminal of the battery and the black one on the other terminal. see if it reads more than 12 volts. if not, the transformer that charges the battery is bad. if it shows 12 volts or more, than it is the battery. good luck.
2141702
It is a parameter in the ideal state. It has a conversion loss during charging. So usually we can count as 80%.Hope this can help you~
1577558
no idea. the computer might not recognize it. i have a feeling thats what happened with mine and thats why i cant get a full charge
2259693
I noticed it doing this on my 75AH battery. But on my 35AH battery it does not do this, or it hasn't yet. I think it has to do with the battery size confusing the voltage reading. Batteries are still tricky to master. It's better that it's cautious during charging rather than brute forcing the battery into oblivion is my guess as to why it's quirky. What size battery are you charging? There is a range specified in the owner manual. I think 75AH is the upper limit. Maybe that's why it's doing that on the larger battery.
2098385
Not certain. When running low I plug in for 4 hours and I seem to get a full charge.
1885708
I received my battery last March (2012) and fully charged it up to use mainly for an emergency or when I travel. I had really forgotten about it until you asked this question. I just took it out of the drawer and found that it is still charged up to 99%. This surprised me as it has been just sitting there for 11 months now.
1887740
It was charged up fairly quickly, within couple hours. Before I got this one, I bought a battery from Radio Shack, with a slightly different current rating, and that one never charged up, just like what you said! You may want to check the current and other spec, to make sure everything is compatible.
2284218
It doesn't hold it's charged. When I have it plugged in it reads 100% ,and as soon as I unplug it will read 96% or as low as 83%