Quinn 4 wrote:
Founded this web site "Our Essential Guide to Batteries" The web site point out any kind of digital camera will run down one batteries in short time. The best one can do is use nickel-metal hydridge battery which can be recharger. Use a smart chargers to recharger the battery. I found at Walmark web site a Universal Battery Charger. Is this fact or fake news, if it is fact it is not talk about when dealing with digital camera, in fact more like not writing about.
Don't let the hostile posts put you off.
An EVF makes enough light to read a newspaper by. That energy has to come from somewhere.
An OVF, on the other hand, draws 0 mA (unless it has a tiny LED display, which draws a tiny
amount of power).
Battery life is a weak point of digital cameras. Batteries in film camers (even those with motorized
film advance) lasted much longer.
The fast processors used in digital cameras draw a lot of power. Now they've added an EVF
that draws a lot of power. And both also make heat. There's no cooling fan in a digital
camera, and no convective cooling.
If EVFs made photographs better, it might be worth it. But they don't Their function is to make
the camera chaper to assemble. But don't expect the savings to passed on the buyer: mirroless
cameras are being prices as high as DSLRs.
Rechargable lithium batteries have been catching fire in handheld devices and even in commerical
aircraft, but no safer replacement is yet available. Despite a huge amount of research, progress
in better batteries has been slow.
Each type of battery produes a different open-circuit voltage. NiMH are slightly lower voltage than
rechargable lithium, so check to make sure the camera says it can use them.
Each type also requires a different charging cycle/algorithm. This can include one or more of:
* constant voltage
* constant current
* sensing battery temperture
Uusally the simplest way to charge a battery is also the slowest. If quick charging isn't done
exactly right, it can reduce the life of the battery.
You are probably better off with a universal charger than a dedicated one. All universal charges
are microprocessor based, so they can use elaborate charge cycles. However, some try to detect
the battery type, which is not reliable.
Proprietary batteries are a complete ripoff. No camera manufacturer makes batteries (it's a very
specialized industry). At best, some jobber makes them to the company's specs. At worst, the
camera company just buys whatever it cheapest FOB China and put its own label on them.
The market for standard batteries (e.g., AA) is much more competitive, which keeps prices
lower. And battery manufactuers such as Duracell (owned by Warren Buffett's Berkshire Hathaway)
and Everready invest in battery R&D.
Any equipment manufacturer that will sell you a proprietary battery has no scruples. It's a racket.