by using a charger
If it is an automatic charger let it charge until the charger shuts off.
No,but you can charge it from an ihome when not using it.
You can - but it will take longer for the phone to charge.
Other than using a charger to charge the 3DS, the only other option is to replace the 3DS battery with a fully charged one.
As long as it is a 12 volt battery you can if you set the charger on low.
You do not charge a battery using a battery eliminator. The eliminator is not a charger, it is an eliminator that allows you to run the device.
You can charge your Touch by connecting it to any computer's USB port, by using a plug-in USB power supply, or by using some form of USB battery pack. I don't know if any of these fit your definition of "without using a charger".
U cant
Go to the store where you bought the phone and request a new charger or see if you are using the charger wrong.
It is not recommended to use a 12 volt charger to charge a 14.4 volt battery as the charger may not provide enough voltage to fully charge the battery. Using the correct voltage charger will ensure efficient and safe charging of the battery.
You cant