I need batteries and connecting lines to use Sony camcorder for a long time. I also need to charge extra batteries.

=====================================
Are the sentences above correct? Do you use connect lines? Do I have to use connecting cords? When we want to use electricity, we need connecting lines. Do I have to put 'the' before Sony camcoorder'?

I need extra batteries and cables to use my (the)(mother's)(aunt Sarah's) Sony camcorder for extended periods.

The use of "connecting" is optional, it is commonly understood that the cables are for connecting electricity.

The sentences you provided have a few small errors. Here's the corrected version:

"I need batteries and connecting cables to use a Sony camcorder for a long time. I also need to charge extra batteries."

Now, to address your questions:

1. Do you use connect lines?
In this context, "connecting lines" should be referred to as "connecting cables" or simply "cables." These cables are used to connect the camcorder to other devices, such as a TV or computer.

2. Do I have to use connecting cords?
Yes, connecting cords or cables are necessary to establish a connection between the camcorder and other devices or accessories. They allow data transfer or power transmission.

3. When we want to use electricity, we need connecting lines.
In general, electrical devices require cables or power cords to connect to a power source. So, yes, when you want to use electricity with your camcorder, you will need connecting cables to supply power to the device.

4. Do I have to put 'the' before Sony camcorder?
The usage of "the" before "Sony camcorder" depends on the context. If you are specifically referring to a particular Sony camcorder, such as one that you own or are talking about in a specific context, then it would be appropriate to use "the" before Sony camcorder. For example, "I need batteries and connecting cables to use the Sony camcorder (referring to a specific one) for a long time." However, if you are speaking generally about Sony camcorders in general, without referring to a specific one, then you would not need to use "the" before Sony camcorder. For example, "I need batteries and connecting cables to use a Sony camcorder for a long time."

I hope this helps clarify the correct usage of the sentences and addresses your questions!