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Old 16th November 2007 | 03:50
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Blacksheep
Cunning Artificer
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Joined: Jun 2001
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From: The spiritual home of DeHavilland
Yes mitzy69, but the classic 747 APU Battery not only had a heater mat to keep it warm in the extreme cold of high altitude flight, it also had a cooling blower to stop it getting too hot on the ground in tropical conditions. Probably one of the most pampered batteries ever.

We used to store the dry cell emergency lighting nicad cells in the freezer to preserve their charge. The extreme cold inerted them to the extent there was no internal discharge. I don't know why we bothered, a deep frozen cell straight out of stores was pretty useless for issue, as it wouldn't light a TocH lamp for several hours after leaving the freezer.
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