Multimeter tutorial I made for ‪@Science.Buddies‬ - also covers current and resistance:    • How to Use a Multimeter  

How to test a lawnmower battery by ‪@DIYBuddyGuy‬ (including charging it):    • lawnmower won't start - how to test a...  

0:00 introduction
0:27 why do you need to test voltage?
2:15 connecting the multimeter probes
3:18 dial settings
4:45 connecting to battery terminals
5:47 how can you tell if the battery is dead?
6:51 what if the screen always says zero?
7:39 avoiding short circuits
9:07 manual meter ranging

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My other channel:    / @ithacanature  
My day job:    / @science.buddies