Question about optima yellow top charging

im a short trip only driver, my 6-7 year old battery wasnt being maintained past 12.1(thats only around 25% ) should be at least 12.6 . i just purchased a new AGM battery just in case, so cant really help ya but in my search ive read that different vec. make & years need different diodes, so i skipped on the GM diode & went with the DIRTY PARTS piece since it states for 4r & fj & should keep the charge at the magic # of about 14.7 for an AGM battery, right now without it i only get 14.0 which ive read isnt enough to keep it fully charged. recieving it on friday so will see if it works
 
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Just got my GM diode in the mail yesterday, hopefully I’ll put it in today
As it stands
Overnight my battery voltage in the am is 13.8 and it drops to 13.1 within 10 minutes unless I jump on the interstate
 
anybody read the thread in the 5th gen section about these things as possible fire hazards? one maker says his are the only safe ones made.
 
anybody read the thread in the 5th gen section about these things as possible fire hazards? one maker says his are the only safe ones made.

Maybe you could post a link to where you read this so others won't have to go looking for it?
 

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