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Batteries (AG10) are necessary part of our books.
Batteries must be replaced when the music stops completely or in the middle of the song.
Be aware that most AG10 batteries on the market are weak/expired and do not work properly with our books (we do NOT recommend Maxell batteries).
WE HIGHLY RECOMMEND TO BUY SPARE BATTERIES - THESE BATTERIES HAVE BEEN TESTED AND WORK PERFECTLY WITH OUR MUSICAL BOOKS
