We offer Dry Battery, details as following,

AAA (UM4, R03) : pvc top and flat bottom/ duration time: 20-25min
AA (UM3,R6) : pvc top and flat bottom/ duration time: 25min
C (UM2,R14) : pvc top and flat bottom/ duration time: 150min D (UM1,R20) : metal top and metal bottom/ duration time: 180-220min

If you are interested in our dry battery, please don't hesitate to contact us for detail checking, while you have brands, quality or other requirements, please inform us, we can make the design as per your requirements.