電池を入れ替えないと。
Sentence Analyzer
English Translation
        It needs new batteries.
    
Furigana
Romanji
        Denchi o irekaenai to.
    
Words
            
                電池
            
            
                (でんち)
            
        
        
            battery
        
    
            
                を
            
            
                (を)
            
        
        
            indicates direct object of action; indicates subject of causative expression; indicates an area traversed; indicates time (period) over which action takes place; indicates point of departure or separation of action; indicates object of desire, like, hate, etc.
        
    
            
                入れ換える
            
            
                (いれかえる)
            
        
        
            to replace; to substitute; to shift; to change places
        
    
            
                と
            
            
                (と)
            
        
        
            if; when; and; with; particle used for quoting (with speech, thoughts, etc.); quoting particle; promoted pawn; indicates question (sentence end)