you would need at least a programmable charger capable of 30volt 2amp, remove the hybrid battery, like he did, charge each individual cell separately.

Yes the problem was the batteries, even though they read good numbers, they were all still bad and time to replace. I put in new hybrid battery and everything worked well again. I was getting a lot of codes and siren warnings because of this bad battery, I learned that just testing them on a meter isn't good enough.

Where did you get the replacement batteries

I have a 2014 Kia Optima Hybrid. What are calling sirens? Are you talking about the hybrid warning lights?

mine did too, but still all the hybrid batteries were bad, the reason I know this is not because I was able to correctly test them or had anyone help test them, it was because when I put in the new hybrid batteries... everything was normal again, no more warning sounds or stalling, brakes failing, no more reading "Check brakes" , "Check hybrid system" Also the car responded faster with the new battery when I hit the petal, almost instant the car would move.. before it would hesitate about a second first. The battery indicator bar on the nav screen that shows the hybrid level has almost full bars now , about 8/10 bars.. where as before the hybrid battery indicator would show 3..2..1 and even no bars at all, then would stall The hybrid battery controls a whole lot more than I thought on this Sonata Hybrid:) I bought a used hybrid battery on eBay for $50..0 it worked well. A new one is around $1800 and costs hundreds to ship to you.

@@HYUNDAI.Hybrid.Repairs im glad it work out for you ,in my case the fault code U0111 is a communication error with the computer module upfront I replace it with a few from the junkyard. and still no luck also repleced the battery from a running car same error came up ..last option is to have a electric check the can system