Discussion
Which storage temperature suits a lead acid battery?
Answer: C
Self discharge roughly doubles for each ten degree rise, so a cool store preserves charge longest. Freezing risks cracking a discharged battery. Room temperature is acceptable, which makes the last option a workable if not optimal choice. Most errors here come from carrying across a result from a neighbouring case where it does not hold. Naming the cost of a choice alongside its benefit is what turns a fact into a design decision.
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