12volt voltage stabiliser.

[Emmit]

I am going to fit a 12volt cigar lighter type socket close to the batteries and I am mindful that certain products don't like the kind of fluctuations that can be caused by the charging of the batteries.
With that in mind, I am going to fit a stabiliser to the cable feed however, whilst I know what to call the item, I have no idea what looks like.
Can any of you good peeps post a photo so that don't get the wrong part.
As usual, thanks in advance.

 

[Canyon904]

Amperor do a range of 12 volt filters, I have a couple of things that don't like 12.5v plus, not cheap but very good quality. www.amperor.com

 

[Jev88]

I have used one like this in the past.
But check what Ampage you need.