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Regrettably, there is no way to determine how many full charges the neckband on the LG TONE FREE™ Bluetooth® Wireless Earbuds will provide because a full charge may have different starting levels.= and the charging When the earbud time and charge delivered will depend on how you charge the unit. When the earbud battery level is 5% or lower, you should hear a voice alert telling you that the battery is low. When the neckband battery level is low, the red LED indicator light on the neckband will blink. The charging speed can decrease because of low current when you charge the neckband cradle by connecting it to a PC and even there, it will vary depending on what version the USB port is since they all deliver different amps even though the voltage is the same. Amps determine how quickly the unit charges. The neckband battery is a 3.7 V/ 120 mAh lithium-ion polymer battery and the ear buds have a 3.7 / 58mAh lithium -ion battery. The rated input voltage for the neckband and earbuds is a DC voltage range of 4.75 ~ 5.3 V, 400 mA. The cradle has a 3.7 V / 410 mAh lithium-ion polymer battery which has a rated input DC voltage of 4.75 ~ 5.3 V, 600 mA. A rechargeable battery has a long service life if treated properly. A new battery or one that has not been used for a long period of time could have reduced capacity the first few times it is used. Do not expose the battery to extreme temperatures, never above +50°C (+122°F) or below -10°C (+14°F). For maximum battery capacity, use the battery at room temperature. If the battery is used in low temperatures, the battery capacity will be reduced. The battery can only be charged in temperatures between +10°C (+50°F) and +45°C (+113°F)...^IFV
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