Sentry ST313A Instruction Manual page 15

Combustible gas detector
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Do not use the battery with conspicuous damage or
deformation.
Charging temperature range is regulated between
32°F ~ 113°F(0°C ~ 45°C).
Do not charge the battery out of recommended
temperature range.
Charging out of recommended range might cause the
generating heat or serious damage of battery.
And it might cause the deterioration of battery's
characteristics and cycle life.
Do not use or leave batter nearby fire, stove, or
heated place.
The battery may generate heat, smoke, or flame.
And it might cause the deterioration of battery's
characteristics or cycle life.
Avoid discharging the battery completely, it can
damage the performance of the battery.
13

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