Horizon Fitness HTS-580 Series Operation Manual page 15

Battery should be recharged only with the charger supplied with the instrument.
Remove the on-board battery from instrument as instructed and connect to the
battery charger.
Battery Removal Caution
▲Before you take the battery out of the instrument, make sure that the power is
turned off. Otherwise the instrument can be damaged.
Recharging Caution:
▲The charger has built-in circuitry for protection from overcharging. However,
do not leave the charger plugged into the power outlet after recharging is completed.
▲Be sure to recharge the battery at a temperature of 0℃～45℃, recharging
may be abnormal beyond the specified temperature range.
▲When the indicator LED does not light after connecting the battery and
charger the battery or the charger may be damaged.
Storage Caution:
▲The rechargeable battery can be repeatedly recharged 300-500 times.
Complete discharge of the battery may shorten its service life.
▲In order to get the maximum service life be sure to recharge the battery at
least once a month.
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