Li-ion 3.6v 60mAh Shenzhen Thumbcells Co.,Ltd. ... is a subsiduary of Thumb International Group Company Limited,which specializes in the development,manufacturing and ... cell, SR/SG silver oxide button cell, CR lithium manganese button cell, 12V (23V/27V) combination ... all over the world. Wellcome to use our batteries and electronic products. We are always ready to ...