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Coolpix Cameras are tricky to use with chargers. I will assume your USB Charger EH-69P is 100 - 240V 50/60 Hz so it CAN work in many places around the world with an adapter. Do not go over 240V or you could damage it.
These cameras like to have the power supply connected when it is on to charge - meaning if you have it connected and you plug the charger in the wall it will NOT charge. So if you plug the charger in the wall first and then plug the cable in the camera it will work. The camera is actually ON when it charges and I never REMOVE the memory card when it is ON.
When you have a dead battery. Plug the camera in and make sure the ON LED lights and the Charge LED flashes. Then don't mess with it. Let it charge completely (Charge LED stops flashing and is OFF) and then unplug it. It will turn off. Then later you can turn it on.
All you need to do is shut down your device, remove the battery if possible and use something small, such as a toothpick, to 'lever up' the little tab inside the USB port on your smartphone or tablet. Do so very carefully and gently, then reinsert your battery and plug it in again.
or this.
This is a common problem. It may be that the charger is dammaged. these Dell chargers have a micro thin communication cable in them that tell the charger to charge the battery. this micro thin cable can often break. Its use it to prevent the laptop battery from over charging, but if it breaks or becomed broken inside tha charger cable, then the laptop simply won't get the charge signal and the battery won't charge. If this is the case, then you will need to replace the charger with another Dell charger compatible with your laptop
If the rechargeable battery is more than 3 - 4 years old then the battery could be worn out. Rechargeable batteries have a finite number of charge and discharge cycles and will lose their charge capacity over time, i.e. won't charge to 100% and gradually the charge reduces until the battery won't charge up at all. OR The battery shows a 100% charge but when the adapter is disconnected the battery drops off to zero capacity in a very short time. If the battery drops to an unacceptable charge level then the battery needs to be replaced. Rechargeable batteries will fail if stored in a discharged state for long periods.
If the laptop battery is more than 3 - 4 years old then the battery could be worn out. Rechargeable batteries have a finite number of charge and discharge cycles and will lose their charge capacity over time, i.e. won't charge to 100% and gradually the charge reduces until the battery won't charge up at all. OR The battery shows a 100% charge but when the adapter is disconnected the battery drops off to zero capacity in a very short time. If the battery drops to an unacceptable charge level then the battery needs to be replaced.
If possible test with another charger like a car charger if you have one also try removing the battery plug in the charger and put the battery back in (don't touch the contacts/gold pins)
if it works with other chargers then the charger is bad
if it doesn't work with other chargers charging port/battery/phone is bad
Remove the PC labtop battery then re insert it again.
If still not charging check the charger connector if its connected as well.
If there was no problem in the charger connector,Check the charger itself.
These all what you need to check only,no problem in your labtop.
If still not charging means one of these :
1- The BATTERY may needs to be changed .
or
2- The charger may needs to be changed.
Some camera will not turn on (Turn on but not take pictures etc) when you plug it in USB, it will only communicate with the camera PC suite software to transfer pictures.
Regarding the battery, if your camera has mobile phones type lithium ion batteries then you can either charge these batteries outside if you have a charger for them or put the battery in camera and plug the camera with its charger that came with it. Its just like charging mobile phone.
If your camera uses AA size (pencil cell) batteries then you will need to either buy Duracell batteries (or any other good Alkaline battery, Duracell is good) and throw them when they stop working or
Buy rechargeable AA size Ni-MH or Li-Ion batteries with charger. Charge the battery with its charger for at least 12 hours before first use or follow the instruction written on battery pack.
I think you are either using normal carbon AA size batteries that are used in clocks or toys, these will not work in digital camera.
If you haven't use your Nikon Coolpix camera battery for a long time and now there is no power, when you first plug it to charger it maybe show none action. And charger longer it will be well.But if your battery Nikon camera battery are used well these days, and it won't be charge. It means you need a new Nikon battery charger
well if it won't charge then it could be the batteries are too low for the charger to pick up or the charger is not working. If you have a voltmeter set it on 200 vdcand plug it into the 2 outter holes of the charger port located under the front of the joystick. Without the charger plugged in you will read the battery voltage and it should read 25-27 volts fully charged Now plug in the charger and the meter will be reading the charge voltage and it shoud be 27-30 volts. If you are reading 27-30 volts with the charger plugged in then the charger is working Hope this helps you
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