I have the 2007 miles 40ZX 72V DC, Mine was before the upgraded Curtis AC Controller and AC induction motor. The new Delta charger was installed greater than 2 years ago by the previous owner. The factory cheap china charger smoked his batteries and even though the car was in warranty and the part failed, Miles would not repair or send batteries or a new charger. It is my understanding Miles new the charger was junk before our cars ever got on the long boat. LOLS! I can't post the link to Delta because I am new. Google should get you there.
I don't recall the price but most golf cart shops sell them online. The part is delta-q 72V QuiQ charger (model #912-7200) On my Miles car they attached a larger computer type 12 volt fan to properly cool the smart charger as it sites under the back seat. There are vents under the seat as well. We have this charger in the miles and the Vantage P1000 EV Van. They work great, No problems and it can be programed for wet or gel type batteries by you, not the factory. It's not cheap, around $700 last I heard, but, neither are smoked batteries! The instructions are super easy to follow as well. Hope this helps, Dave
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Originally Posted by cbaker
Well I took mine to the battery place last week and they pulled all the batteries and discharged and recharged them. The guy there said the front 2 discharged too quickly with his 75 amp discharger, even though when I checked them with my VOM the numbers were all around the same. It's much better and I'm not experiencing the overheating problem or limiting that was going on before so maybe it was low voltage and not the controller. His concern was that my onboard charger wasn't charging them up enough. He's checking to see if he has access to one that will work with the Miles, and I'm searching as well. I noticed the new models come with a Delta Q, but I have no idea which model. Any suggestions are appreciated 
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