Formula: Volts of the battery x Ah rating of the battery / Watts of the load / The battery’s depth of discharge (DoD) x The efficiency of the inverter
If you have a 100 watts 42" TV and a 12V 7ah battery lying around and a UPS for example, then you can work out the runtime using the calculator below.
The battery’s depth of discharge (DoD: 1.25 = 80% used, 2 = 50% used, 3 = 33.3% used, 5 = 20% used )
The efficiency of the inverter (60% if you are using a UPS, 85% if you are using a good inverter)
For those new the industry, DOD sounds like it may be a difficult topic to understand, but it's actually simple. For instance, a battery that has been drained 30% has a 30% DOD, and 70% of its capacity remains.
The more frequently a battery is charged and discharged, the shorter its lifespan will be. Discharging a battery entirely, dramatically shortens the useful life of the battery.
Most modern lithium-ion batteries have DoDs ranging anywhere from 80% to 95% versus their lead acid counterparts can only do 30% to 50%.
Lithium also have thousands of cycles and lead acid has 200 to 400 cycles at best.
The Sonoff lightbulbs are very affordable and provide you with the basic functionality that a smart home needs. If the budget is tight and you don’t need all bells and whistles of the more expensive lights, Sonoff lightbulbs will do the job just fine. The prices start from $9.90 for the (plastic, White + color temperature) B02 B A60 and $12.90 for the fancy, pear-shaped B02-F-ST64 (glass, retro look, White + color temperature). As far as connected lights go, the prices are very attractive and Sonoff lightbulbs indeed are as inexpensive as you can get.
Read The ArticleBinance exploded onto the scene in the mania of 2017 and has since gone on to become the top crypto exchange in the world. The company is very dedicated to making the exchange the premier source for trading, there are many trading events all the time, and coin approval doesn’t come without solid review. This allows for an exchange where every coin on it is considered to some degree legitimate. Binance actually understands the mindset and ethos of the crypto-community and the mantra of decentralization, it’s no wonder that they have the highest trading volume in the world while being a relatively new exchange.
Read The ArticleI know this review is long, but I wanted to include all the details to help you decide. This smart security camera from Xiaomi had so much going for it, I still believe there a route for Xiaomi to redeem themselves and make this camera available to its full potential by issuing a firmware update to remove the restrictions and allow RTSP access from the Xiaomi camera.
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