User Manual - Page 225

For NW-E394. Also, The document are for others Sony models: NW-E393, NW-E395

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period of time, be sure to follow the storage instructions below.
Leaving a charged battery unused for a long period of time causes deterioration of the
battery and results in a decrease of battery capacity. The deterioration is more severe
when the battery is stored with a full charge, and is accelerated by prolonged exposure
to heat such as when leaving your Walkman in a car while connected to the power port.
Store the Walkman at temperatures below 35 °C (95 ºF). Charging or discharging the
battery to approximately 50 % of capacity before storing is also recommended.
The battery deteriorates when left in a depleted condition. Charge the battery to
approximately 50 % of capacity at least once every six to twelve months to prevent
deterioration.
4-579-798-12(1)
Copyright 2016 Sony Corporation
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