In real life I do data center modifications and other fun,
The big wet and gel battery UPS systems need to be at 68 degrees to get full pull on the batteries we actually control the environment better for the UPS than the computers..
On a megawatt ups a couple degrees makes a huge difference on run time, its better to be just a little hot than cold..
Dave
PS: They cell adhesive heat packs for batteries. But you need to allow for letting them shed heat as well. I think a box with a thermostat and a small muffin fan would do the trick.
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If it has a motor its worth playing with.......
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