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Which battery type tolerates repeated deep discharge?

  • A.A deep cycle or traction battery with thick plates
  • B.A conventional starter battery, whose construction is optimised for the delivery of a very high current
  • C.An absorbed glass mat starter battery
  • D.A stop start battery, which is designed for frequent cycling and therefore withstands a full discharge repeatedly

Answer: A

Thick flat plates survive hundreds of deep cycles at the cost of a lower cranking current. Stop start batteries cycle frequently but only shallowly, which makes the last option a genuinely tempting near miss. Leisure and forklift batteries are deep cycle types. Naming what changes and what stays the same is the reliable route through questions of this shape. Most errors here come from carrying across a result from a neighbouring case where it does not hold.

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