Charging my Canadian bought battery in Afghanistan

if the battery is flat and below 5 volts the charger on digital charger dont charge, you need an old charger one with a 4 to 6 amp charging capacity to charge the battery, digital chargers have a safety device on them to stop the charger from working as when a battery becomes faulty it stops charging.

You only can safely use an original Canon power cord when you want to charge the batteries in the camera. That can be expensive. Why not buy an normal battery charger, to charge the two batteries outside the camera.
I know it looks convenient charging in the camera, but I charge all my batteries in external chargers. Is also much safer for the camera.

It sounds like one of two things. Either there is a short circuit in your camera that is draining the battery or the camera's battery charger circuit is not charging the battery. There are a few things you can do. You can send the camera to Nikon USA for repair (look on the Nikon website for the address the closest repair center). The other thing you could do is buy an inexpensive external charger for the battery and see if the camera works for a resonable period after charging the batteries externally. Adorama.com carries both the Nikon and off brand models and will give you the best price. It that works, you know that the camera's battery charging circuit is the problem. If that is the case, you could pass on repairing the camera and just use the external charger. If that does not solve the problem, the camera will need to be repaired.

I don't understand your description of the problem. If you are trying to charge the camera battery in the camera (using USB lead?) then this won't work. The battery for this camera must be removed from the camera and charged in the separate battery charger that was supplied with the camera. If you bought the camera second-hand and didn't get the charger, you must buy a replacement. They can be bought on Amazon.

the charger light detect the battery level charge, shows red when charging and green when fully charged.when the charger light is not lit,may be the battery dosnt hold any charge that means its likely that the battery is defective

It is not your charger. It is your battery.

Most likely the charging circuitry has failed. When you fully charge the new battery what does the battery meter read on the camera? Your two options no matter what the case are repair vs. replacement. If you need further assistance let me know.
Thanks,
Lee

Most likely your batteries are just not holding a charge. However, before you spend good money on new batteries, try charging them on another charger (friend or sympathetic photo shop?). Could be the charger also. Usually it's the batteries, though.

I have the same problem. Worked for 3 years and now the battery charges to green but goes dead immediately. I've changed batteries. Its the camera not the batteries. Works fine plugged in. Obviously the cameras are not charging the batteries. Canon must know but I cannot find a fix and warranty is over. I guess buying the expensive camera of the day isnt always assuring you of quality.

The canon powershot s70 comes with an external battery charger. Open the battery door (bottom of the camera, slide it away from the center of the camera body) remove the battery (push the little brown tab and the battery will pop out) and place the battery in the included external battery charger.