On Wed, 15 May 2019, Ryan Coleman wrote:

> it’s not battery testing but I follow BigClive on Youtube and he’s had a 
> number of interesting videos about electronics. His one from last Friday 
> is one I am going to employ at my work as part of monitoring a remote 
> section of property against trespassers.
>
> He, alone, is responsible for me spending over $250 in the last two 
> years on small electronics gear and upgrading some of my soldering kit. 
> :)
>
> https://www.youtube.com/channel/UCtM5z2gkrGRuWd0JQMx76qA 
> <https://www.youtube.com/channel/UCtM5z2gkrGRuWd0JQMx76qA>

That guy is very entertaining.  He has put up 1,447 videos in 11 years. 
That's a lot of videos!  537,490 subscribers is a lot too.

Mike