| Battery Applications & Technology Portable lead-acid batteries are usually of
the sealed type constructed similarly to that depicted
in below. Their operation cannot usually be described as
cyclic or float, but is somewhere in-between. Batteries in
this category may be frequently deep cycled or remain
unused for a relatively long
time. Typical applications are portable tools, toys,
lighting and emergency
lighting, radio equipment, and alarm systems. Most portable
batteries may be recharged
to 80–90% of their original capacity in less than an hour
using a constant-voltage charger.
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