And is there the rest I’m not contemplating that may cause me downside by going the lighter battery route? Dry cells, button batteries, and lithium–iodine batteries are disposable and can’t be recharged as soon as they’re discharged. Rechargeable batteries, in distinction, offer important financial and environmental benefits as a end result of they can be recharged and discharged numerous occasions. As a end result, manufacturing and disposal prices drop dramatically for a given variety of hours of battery usage. Two widespread rechargeable batteries are the nickel–cadmium battery and the lead–acid battery, which we describe next. A lead storage battery, also called a lead-acid battery, is the oldest sort of rechargeable battery and one of the most frequent power storage devices.