I just got a used phone and all the time when i put it on the charger it takes normal time to say full battery. so i take it off the charger and 5 mins later its down two to bars of battery life. then 2 mins later it has three bars of battery left. then it goes to one bar for a about an hour then it goes dead and powers down. should i buy a new battery.
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Okay what happens sometimes is the charger gets into a feed back loop. What to do is remove the battery unplug the charger wait a few seconds (Maybe 20/30) plug the charger back into the outlet and then put the battery back in the charger. It should start to charge again and a few minutes later go to the blinking for full charge green.
It'll happen the other way as well meaning if the battery gets a memory (they say they don't but they do) you need to unplug the battery let is sit till it's cool and put it back on charge again. I've had this problem many times and have put it on charge and back off several times with in 15 minutes before it started to charge as it should.
Also these batteries do have a life span and if it's a three year old battery with many charges it could be failing meaning it just won't take a full charge.
Okay, might not be reading this right but here goes. If the camera shows the batteries as full then I'd go with that. The charger will come on for a few seconds even with a freshly charged battery because it take that long for the charger to realize the battery is already full. You can't feed an already full battery, so the charger is shutting off completely. Yes normally the light would stay on and the charger would continue to trickle a charge into it it until it is removed. In your case I think you have those batteries stuffed to the gills so the charger is shutting right down. One of the problems with these batteries is as much as the manufacturers deny it they form a memory. Best thing to do with these rechargeable batteries is drain them right down and then replace with a freshly recharged battery.
There are basically 3 types of chemicals currently being used for cell phone and laptop batteries. Ni-cad, Ni-mh and Li-ion. There is a fourth makineg its way in Li-ion polymer. A couple things are consistent for all types of batteries no matter what chemical is inside. You must initially give the battery a 12-14 hour charge on the home charger. (Don't use a cigarette adapter for the first charge. This conditions the battery and don't take it off the charger that first time even if the charging indicator says it's full after 3 hours. Also the manufacturer's also state to run it thru 3 charge cycles. What that mean's is that you fully charge and fully drain 3 times. 1 full charge + 1 full drain = 1 charge cycle. Here's where the way you charge the battery starts to differ.
Ni-cad: Mostly only on older devices, has a "memory" effect, should be drained before a full charge is put on it, should be removed after overnight charge or can be overcharged and burnt out.
Ni-mh: Still used for some devices, has slight memory effect but not enough to have to fully drain before the recharge, should not be consistently left on charger after full charge that can eventually burn out battery and shorten usage time.
Li-ion and Li-ion polymer: Used on a lot of newer devices, has no "memory" effect, should be recharged as often as possible, actually likes to be charged and draining it regularly can cause the usage time to be shortened, can NEVER be overcharged so whenever you're near a charger put it on there. Besides those benefits a li-ion battery is lighter and smaller but the chemical can hold more charge than Ni-cad and Ni-mh.
So the one reply to your question said to error on the side of draining the li-ion batteries. This is incorrect information. You want to charge the battery before it gets below a 20% charge. Also batteries will not go bad from accidentally doing the incorrect charging procedure here and there but normally follow the correct procedure. One last note try to use the home charger more often than the cigarette lighter charger for best long term results. Cigarette lighter chargers do not give a full charge (about 95%) which in the long run can damage any type of battery listed.
PLEASE BACK UP YOUR FILES BEFORE UNLOCKING This will also bring the phone to default settings 1. First do a CUSTOM reset: *2767*2878# turn off the phone 2. take out the battery and sim and put wrong network SIM and insert only a half of it, Very important so it won't ask for network password and shows "Insert SIM" message.(possibly in a different language) Now put the battery ,and switch the phone on .(phone shows "Insert SIM" message.) 3.push the sim fully in at this stage the phone is still asking to "Insert SIM" 4. Make a FULL reset: *2767*3855# 5. The phone should reboot working with "wrong" sim inside. 6. Make a Change the NCK password to 8 zeros by typing: *7465625*638*00000000*00000000# 7. Now Disable network lock By typing: #7465625*638*00000000# Phone is unlocked
How to save your dead battery:
Please note using below method at your own risk, and you have been told.
Take out you dead battery (PDA battery,PSP battery,Phone battery etc), wape it around by using a big piece of dry
Then put the newspaper waped battery into the freezer at below zero temperture for 4 days.
After days, take the whole thing out and put in room termperture for one day.
Recharge the battery and use it.