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• Screen display is unclear.
- Usually under direct light (Sun light), display is hard to see.
If so, move to shadowy area or place with dimmer light.
Try to adjust the brightness of screen.
• Mal operation while using the phone or power does not turn on.
- Separate battery pack, reset battery pack, and switch on again.
• In case available hours for battery pack for use is different from that in manual.
- Naturally, available hours of battery pack for use gradually decreases as charging and discharging is repeated.
In case charged battery pack is kept a while under low or high temperature, available hour may change.