I have bought a litium button battery to replace the old one that seemed to be causing the date and clock trouble, and replaced the battery without so much struggling except for taking out the battery..
お子さまには、電池を交換させないでください。
Don't let your child change batteries.
電池を交換し、ケースを閉じると、「ERR」というエラーメッセージが表示されることがあります。
Once the battery is changed and the casing re-secured you may see an error message reading ERR.
Apple began replacing the batteries after backlash from customers who noticed that Apple had started to throttle the speeds of the phones, making them feel slower.
電池を交換する場合はフレキシクリップ上部のネジを外し、ケースを開いてください。
To change the battery, simply remove the screw located at the top of the clip and open the casing.
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