Like all other types of batteries, Li-ion batteries will wear down over time, holding less and less charge. Apple says its laptop batteries will reach 80% of their original capacity after âup toâ 1000 full discharge cycles. Other manufacturers commonly rate their batteries 300 to 500 cycles.
A digital single-lens reflex camera (also called a digital SLR or DSLR) is a digital camera that combines the optics and the mechanisms of a single-lens reflex camera with a digital imaging sensor, as opposed to photographic film.
SLR stands for single lens reflex. SLR (single lens reflex) refers to the way these cameraâs work. When a photographer presses the shutter button, a mirror flips out of the way to reveal the sensor. Some people also refer to them as DSLR, with the D being short for digital.