Battery condition gauge

[Skyedriver]

A few weeks ago I saw a car with a little white gauge connected across the top of the battery. IIRC it gave a read out on battery condition etc but also acted like a tracker. Sure there was an App for the phone etc.
I know I'm not imagining this but cannot for the life of me remember it's name.
It wasn't expensive, made in China.
Anyone able to assist?
thanks

[E-bmw]

There are many different ones, I use these on each battery in the motorhome.

https://www.ebay.co.uk/itm/295644935211

[Oliver Hardy]

Skyedriver said:

A few weeks ago I saw a car with a little white gauge connected across the top of the battery. IIRC it gave a read out on battery condition etc but also acted like a tracker. Sure there was an App for the phone etc.
I know I'm not imagining this but cannot for the life of me remember it's name.
It wasn't expensive, made in China.
Anyone able to assist?
thanks

The tracker does not work, or at least it is inaccurate.

The battery gauge I am also not sure off. It was showing 0% charge on my diesel car after it was stood for a while yet started without any issues.

[E-bmw]

Oliver Hardy said:

Skyedriver said:

A few weeks ago I saw a car with a little white gauge connected across the top of the battery. IIRC it gave a read out on battery condition etc but also acted like a tracker. Sure there was an App for the phone etc.
I know I'm not imagining this but cannot for the life of me remember it's name.
It wasn't expensive, made in China.
Anyone able to assist?
thanks

The battery gauge I am also not sure off. It was showing 0% charge on my diesel car after it was stood for a while yet started without any issues.

Does that car have a separate starter battery?

If so that could be why, if it installed on the main battery.