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.
So there you have the difference between digital and film. Coming to SLR: It stands for Single Lens Reflex. DLSR stands for Digital SLR. So the difference between SLR and DSLR is primarily the difference in the recording medium they use. Now let's get to what an SLR camera (be it digital or film-based) is: