LG AP551A Series Owner's Manual page 13

CAUTION
• The appliance must only be supplied at safety extra low voltage corresponding to
the marking on the appliance from an AC adapter (5 V, 1.8 A or higher). The AC
adapter must be purchased separately. Using an unapproved charger may cause
failure or variation in the charging time.
• This appliance contains batteries that are non-replaceable.
• Charge the battery at temperatures ranging from 15 °C to 40 °C. Charging the
battery at temperatures outside this range may reduce battery life or increase
the charging time, and charging may be suspended for safety reasons.
• The recommended temperature range for operation is -20 °C to 50 °C.
Operating outside of this range may shorten the run time and the battery life.
• Charging from the USB port in a vehicle or computer may be slower or cause
product failure.
NOTE
• It takes approximately 2 hours for a full charge.
- Battery charging time may vary depending on the battery condition
(battery life, remaining battery power) or charging conditions (ambient
temperature, etc.).
• Operating time is up to 8 hours when fully charged.
- The product's operating time depends on the battery status (battery life and
charged state, etc.) and the product usage conditions (activity, voice unit
function, Bluetooth connection, operating temperature, etc.)
• The run time of the product will decrease gradually over the useful life of the
battery.
• The product ships with the battery not fully charged. Charge the battery fully
before using the product for the first time.
• During long-term storage, fully charge product at least once every 6 months.
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