…I disagree with the suggestion that hot climates kill batteries…
Correct on many points Ms kathyricks, but incorrect on the chemistry of temperature and battery lifetime. See the standard Johnson Controls graphic, which correctly captures the fact — which one cannot know through personal experience, only through testing of large numbers of cases, such that statistical confidence is possible — that [ital]the hotter the mean temperature of a region, the lower the projected battery life of a lead-acid system.[/ital] Here is an example of that standard and reliable graphic, http://www.tiresplus.com/img/global/...ctancyZone.jpg
, and here is a further primer restating the following simplified explanation of the underlying mechanism, batteryuniversity.com/learn/article/can_the_lead_acid_battery_compete_in_modern_times (add http:// to the preceding web addresses). The simplest way to think about the temperature effect on lifetime is that every battery is, through its environment and its use, driven toward a thermodynamic endpoint that is inescapable (that is, its being dead). Background chemical reactions — ones unrelated to the owner's use or abuse of the battery — contribute to the rate at which this endpoint is reached. As rule of thumb the rate of chemical reactions double for every 10 deg C difference in ambient temperature, hence the hotter the environment, the faster the rate of the inescapable background chemistry that is occurring (and the shorter relative lifetime of the system). Otherwise, the well-informed, thoughtful personal experience-based observations you make, Ms k, are important, and a valued addition, alongside those of similarly broadly experienced individuals who also note the differences in OE provided parts in different locations, the narrow range of US battery manufacturers, their individual experiences with particular brands such as Interstate, as well as with issues of parasitic drain, deep cycling, etc. Cheers. Prof D.