Fork me on GitHub

Battery Runtime Calculator
Calculate your battery runtime using Watts

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.

Reset Calculator

Additional information about the calculator

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)

How does DoD work

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.

Lithium vs Lead Acid

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.

Some articles you might also be interested in...

How to buy bitcoin on Binance?
How to buy bitcoin on Binance?

Binance 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 Article
Sonoff SNZB-02 Zigbee Temperature & Humidity Sensor
Sonoff SNZB-02 Zigbee Temperature & Humidity Sensor

Enclosed in the same shell, SNZB-02 Zigbee temperature & Humidity sensor reports back every couple of minutes. The sensor is powered by CR2450 3V battery. The extra capacity means that the sensor will last a really long time. I have a heater connected to eWeLink app and, once I added a hub (absolutely required) this thing has performed well. The heater is controlled within +- 1°C. That's another thing, eWeLink only provides temperature readings in °C with no option for °F. I'm thinking about placing another sensor on the outside of the window so that I can control based on outdoor temperature as well.

Read The Article
How to choose the right web hosting company for your business
How to choose the right web hosting company for your business

There are plenty of web hosting providers out there, and it may seem difficult to decipher the good from the bad. So I have put together a guide on how to find the right web hosting provider for your business and my personal recommendation of who to use depending on where you are in the world. Teaming up with the right web hosting service is more important than you think. It’s a partnership. Opt for the wrong one and you could find yourself struggling to get support, suffering downtime, or worse.

Read The Article