D batteries are commonly used in portable music systems, large flashlights and oversized flashlights, ignition systems for gas heaters, irrigation controls and toys. Alkaline batteries have a shelf life of approximately 6 years. A/D batteries are 61 mm long and 34 mm in diameter and weigh 139 grams. They are also available in the rechargeable HR20 model with the same diameter and thickness. Their weight varies depending on the battery's capacity. As with all batteries, the voltage is 1.2 volts and the capacity in mAh can vary depending on the brand and model. - Brand: Philips - Type: D Alkaline - Technology: Alkaline - Voltage: 1.5V