Shandong Zouping Mingbo Power Source Co. Ltd invites power supply experts of Chinese Academy of Sciences as guide, and produces C1800mAh, C2000mAh, C2500mAh, C2800mAh size NiCad rechargeable batteries and C4000mAh, C4500mAh size ni-mh rechargeable batteries. We can provide other size and capacity of the battery according to requirement. Our products have passed ISO9001-2000 and Germany Rhine TUV Safety Certificate. The batteries diameter is 24.9mm, height is 50mm. Good quality and after sales service, we will give the best price. Products are recognized with minbo logo. OEM and ODM services are provided. If you need more information please contact me at any time.