LG FR74 Owner's Manual page 11

Checking battery status
1. LG Heart Rate Earphone
2. LG Heart Rate Earphone
Battery
LED indicator
Status
Very Low
Red / Blinks.
Less than
30%
Red / Turned on.
Checking charging battery status
LG Heart Rate Earphone
Battery
Status
Charging
,
Note
If the smartphone is not connected, the battery power can last for up to 5 days, if connected, 2
days. It takes 3 hours to charge fully.
When the battery is low, LED indicator blinks. Charging the battery is needed.
When the battery is empty, the LG Heart Rate Earphones is turn off automatically.
To use LG Heart Rate Earphones for the first time or after leaving for long, charge the battery first
before use.
If you use USB HUB, the bettery may not be charged.
Using in -15 °C ~ 45 °C is recommended. The battery capacity may decrease if you use in too high
or low temperature.
Voice
information
Battery very
low. Please
charge now.
Battery low
LED indicator
Red / Turned on.
Starting the LG Heart Rate Earphones
Battery
LED indicator
Status
Less than
80%
Yellow
/ Turned on.
more than
81%
Green / Turned on.
Battery
Status
Charged
11 11
Voice
information
Battery
medium
Battery high"
LED indicator
LED off.
2