Battery gauge riding high?

[Trucko20]

My battery gauge is sitting above 14....probably in the 15.5 range or so.   This continues after the truck is fully warmed up.   My truck is a 2014, I've had it since 2016.    I believe it's still the original battery at 46k miles. 

 

Any ideas?  Thanks. 

[papageoff]

Go get your battery checked at the auto parts store.  The check is free.  My guess would be that the alternator is constantly trying to charge the battery because it's lost a cell.   If that's the case, it'll eventually wear the alternator out.  

[Coby7]

My first thought is a bad ground and your alternator is compensating for lost of voltage at the bad connection.  If it was a bad cell it would read 10.25 when you turn the key to accessory.  Check your connections for the green stuff and clean and tighten them.