Hybrid battery repair in Bagdad, Arizona

Bagdad is a census-designated place of about 1,900 that exists for the Freeport-McMoRan copper and molybdenum mine, which took over from Phelps Dodge in 2007. Freeport owns the housing and the commercial buildings; it and Morenci are the last two company towns in Arizona. The last stretch in on SR-97 and SR-96 is two-lane road shared with ore haulers.

• Mine shift commutes are short and repetitive — the duty cycle where one weak module shows before the rest.
• At about 3,800 feet summers are milder than Phoenix; winters bring frost that finds a weak 12V.
• The nearest city of any size is Prescott or Wickenburg, so mobile service saves a very long day.

You get genuine summer heat but nothing like the Phoenix low desert, and you get actual winter nights. That combination is its own kind of stress: the pack ages in summer, and the wide daily temperature swings are hard on the 12V battery year-round. Hybrids here generally do better than Phoenix cars of the same age — but the 12V fails just as often, for different reasons.

• Milder summers mean pack ageing is slower than in Phoenix. Don't assume Phoenix-based advice about lifespan applies to you.
• Cold mornings reduce regenerative braking until the pack warms up — a shorter electric range on the first few miles is normal, not a fault.
• The engine runs longer on cold starts to reach operating temperature. That's expected behaviour, not a failing battery.
• Large daily temperature swings are hard on 12V batteries. Test annually.

This is a long way from Phoenix, and we come out here. A trip like this is scheduled ahead rather than same-day, so call with the year, model and what the car is doing and we'll set a date.