NIMH 3.6v 2500mAh Shenzhen Thumbcells Co.,Ltd.is a subsiduary ... main products including: LR/AG button cell, SR/SG silver oxide button cell, CR lithium manganese button cell, 12V (23V/27V) combination button ... standard.In 2004,we have successfully manufactured environmentally friendly button cell,which contains mercury of less than 5/1,000,000 ...