Nokia BL4C - Batteria Originale (860mAh) 2300/6131/6100 : Amazon.it: Elettronica
Nokia 6131 - Wikipedia
Nokia 6131 Battery
Nokia 6131 review: Nokia 6131 - CNET
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Nokia - 6131 Battery | Complete Battery Source
Mobile-review.com Обзор GSM-телефона Nokia 6131, часть вторая или про дизайн и особенности