How often, and for how long, should I turn over my car's engine in order to preserve the battery? [more inside]
I would like to learn more about large-scale UPS systems, particularly the battery strings used in traditional RBOC/Telco applications. These are the sort of beasts that use huge strings of 6V 220aH deep cycle batteries, or even large numbers of 2V 400aH batteries on very strong earthquake-resistant shelving wired up to create a 48V mega-battery. Can anyone point me to the most definitive reference materials on the subject?
i may have injured the electrical system on my motorcycle. [more inside]
Dead battery--is there a problem with my car? [more inside]
Why won't my car start? [more inside]
Do electrical devices running on your car's electrical system affect gas mileage? [more inside]
Calling electricians: can I use one of those "battery chargers" they sell at Auto Zone to power a small appliance that needs 12V? [more inside]