Hello, Nikon Coolpix 8100 camera. Battery has difficulties loading. light blinking at back stops aft. several minutes, then beep, and start blinking faster. Blank screen confirming battery is empty.

did you plug it up for at least 10 minutes before turning it on? if you did then yeah, maybe the battery is the problem. im not an expert but just tryin to help.

There should be 3.7 volt come out from the battery connectors - +
If the battery is low voltage a short measure after a3 minutes and you see the batterie voltage runs very fast back by measure with a multimeter , replace the battery. if there is no difference after the connect of 3 minutes the loadcycle if you can measure any dc from the load connector of the loader to be shure that its not the loader what is defect.

Sounds like you have a bad battery. Check your users manual for how to change it.

check the battery

Battery is broken, replace the Nikon Coolpix 3100 Digital Camera Battery Bar: http://www.2deals.net/Digital-Camera-Battery/Nikon/Nikon-Coolpix-3100.html

I have had mine for over 3 years and this just started happening. I bought a new battery and it seemed to fix the problem for about a week but is doing it again. It seems like it won't fully charge now like it formerly did!

Read page 16 of the manual. Do not use any other charger with this camera. Are you sure you have the battery inserted correctly? When trying to charge, does the green light blink? If so, when it stops blinking and turns off, the battery should be fully charged. Do not attempt to turn the camera on while the charger is trying to charge the battery.

Hi, possible causes:
Completely exausted battery.
Charger or Usb cable bad.
Fuse open in charge circuit or several damage.

Greethings.

It's not unusual for a defective battery/charger/camera to happen. Take it back and ask for a replacement.

Check the PDF manual on the software disk to be sure Nikon Technical Support for confirmation- this is a possible replacement situation