New: Manufacturer statement about the temperature problem

Regarding the evolution of temperature in laptop batteries, which we explain in detail in this article, we asked leading manufacturers to an official statement. Here are the answers to our questions: the normal temperature values for Dell Studio 1537 battery from 20 to 40 degrees Celsius in a notebook almost always exceeded. What effect does, with “normal” operation of the Notebooks (Eg, DVD playback), resulting temperature (greater than 50 degrees Celsius, the “specified” Run-time and lifetime of the battery packs?
Christoph Kaub, product manager for Latitude notebooks Dell”Latitude notebooks as a whole, certified and tested. This is what the certification before depending on model and configuration, a storage and operating temperature between -15 and +65 degrees Celsius. Depending on the type of Dell Inspiron 1501 battery has a life of 300 to 500 charging cycles (pro rata to understand on a full charge cycle). An explicit consideration of the impact have different ambient temperatures are not made there. ”
Fujitsu Siemens Computers”The running and a battery life may vary depending on system temperature and ambient temperature. For example, in Africa have a lower Dell Inspiron 1520 battery life than in Norway. Fujitsu Siemens Computers respects the design of the notebooks that the batteries are not heated or as little as possible from the system. A certain increase in temperature will not be reason alone to avoid, because the battery is in discharging warm myself. ”
Lenovo”At temperatures above 20 degrees Celsius, the capacity differences are not in a relevant area. And then there is at temperatures between 40 and 60 degrees Celsius almost no capacity differences. The temperature should be low, approximately around zero degrees Celsius, the capacity decreases by a few percentage points. Thus, the “normal” for operation of the notebook, such as DVD playback, resulting temperature has no significant impact on the “specified” run time and life of the Dell Vostro 1420 battery pack. ”
Dirk Lohmann, senior manager of service and support, Toshiba Germany”The technological descriptions in your article, we can confirm. Toshiba has taken into account when designing its laptops this framework. Therefore we can not confirm that the standard temperature values for batteries in Toshiba notebooks are exceeded, as long as they are operated at room temperature. Therefore we do not see it as necessary to issue a special use recommendation with regard to reduced battery life due to high temperatures during normal operation. Critical, we see the point of storage, for example in the car. This can occur very quickly due to sunlight or when stored below zero degrees in the trunk of damage to the Dell Latitude E4300 battery. ”
Conclusion: Most manufacturers downplay the problematic effects of high temperatures on the life and durability. Dell and Lenovo will see the negative effects of high temperatures up to 65/68 degrees Celsius on the life as not given. In contrast expresses Fujitsu Siemens that the run-and life will vary depending on the system and ambient temperature. Toshiba does not specify recommendations on use of life lost at high temperatures. As in the “normal mode” and use at room temperature, the conditions are met. The company admits, however, that, for example, sunlight or storage below zero degrees Celsius in the car battery damage occur.