Two of our three batteries that our team uses no longer work because they die around 50% charge. Here is a picture about what they look like: 
Does anyone have any idea what is going on? Thanks!
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run the battery medic program and post results here.
run the medic with a fully charged battery
run when the battery fails (or whatever is happening) with the red led on.
https://kb.vex.com/hc/en-us/articles/360035590212-Battery-Medic-Electronics
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I am not sure what to do as there is no button saying medic program: 
Nevermind, I figured it out.
how did you figure it out?
i am having the same issue
just charge it and it goes away. This has happened numerous times to me and it fixed it
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