you can go to iibattery.com,
It really isn't cheaper to buy batteries online unless you are talking about a specific battery for your model of camera. In that case, I would call your manufacturer, but if you are just looking for standard batteries, any home depot or Wal-Mart will suffice.
buy one off trademe.co.nz
means your battery is useless and you need to buy a new one, at least that's what my nikon manual said!
The blinking on your Nikon D3300 battery charger indicates that it is charging the battery.
It is a rechargeable battery for cameras and you can buy it on amazon, ebay, or from nikon. I would just search around on the internet for it. Look at your local camera store.
how to replace the door battery of a nikon coolpix 7600
The best battery for a Nikon D7100 camera is the EN-EL15 rechargeable lithium-ion battery.
Nikon
Your closest electronic/specialty store for your Nikon - such as best buy, radio shack, etc.. If you cannot find one there try to figure out the quickest shipment for all the companies including Nikon's original site.
You can expect to pay about $25 for an extra battery fo tthe Nikon Coolpix .
The battery life of the Nikon D5600 camera is approximately 820 shots per charge.
You can purchase a Nikon D90 battery charger at camera stores, electronics retailers, or online on websites like Amazon or the Nikon official website.