They never come near

I've many friends, whose death is clear

The lucky ones can live again and again

When I die I'm replaced by a twin.

What am I?

Hint:

I'm used nearly every day, but often ignored

I am a

Battery

I have two heads They never come near

Two ends of a battery

I've many friends, whose death is clear

There are many, many dead batteries around

The lucky ones can live again and again

Rechargable batteries

When I die I'm replaced by a twin.

If one battery dies, you buy a new one (same type) and replace it.

• Man, I thought I made it a bit cocealed, what gave it away? – Jason_ Aug 3 '16 at 20:01
• @Jason_ - not sure why I came up with the answer, just started thinking of everyday things, but (I think) the lucky ones can live again and again may have been the line that made me think of the answer. – YowE3K Aug 3 '16 at 20:03
• Well great guess! – Jason_ Aug 3 '16 at 20:10

A Pencil

They never come near

Point and Eraser at opposing ends

I've many friends, whose death is clear

Broken, dull, or sharpened to an unusable length

The lucky ones can live again and again

Can be sharpened again and again. Alternatively, mechanical pencils should be essentially infinitely reusable

When I die I'm replaced by a twin.

Pencils are essentially identical, and you'll likely replace one with another.

• Welcome to Puzzling, and great answer! c: – Deusovi Aug 3 '16 at 22:48
• The two "heads" of the pencil can actually come near by sharpening too much. – EKons Aug 4 '16 at 11:55

I think the answer is batteries.

The poles of the battery, used to power the device the get plugged into.

They never come near

The battery is a fixed shape and so the two heads of a single battery do not touch.

I've many friends whose death is clear

Batteries are said to "die." And you can tell they have died when the device you are using loses power. Also, some batteries let you gauge the power left in them by holding down certain points.

The lucky ones can live again and again

Rechargeable batteries escape the fate of their normal brethren.

When I die I'm replaced by a twin.

Normally you don't mix battery types, so you replace like for like. Also people normally buy a single type at a time.

Hint:

I am used nearly every day but often ignored.

You don't give batteries a thought until your device stops working. So you often ignore them.

Edit: Too slow on mobile, someone beat me to it.

• Your reasoning was great though! – Jason_ Aug 3 '16 at 20:02
• Thanks. I like your puzzles by the way. It's not some obscure computer coding language mystery or something. – Topple Aug 3 '16 at 20:03
• Thanks I enjoy coming up with riddles, I'll post another one tomorrow if I can – Jason_ Aug 3 '16 at 20:09