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...

Review: Sonoff GK-200MP2-B a Wi-Fi and Lan enabled Wireless IP Security Camera
Review: Sonoff GK-200MP2-B a Wi-Fi and Lan enabled Wireless IP Security Camera

You probably know the Sonoff brand for smart home electronics like the POW R2 or the Sonoff Basic switches, but they also released a security camera, the Sonoff GK-200MP2-B. I decided to try it out and made an in-depth review so you can make the right decision. Considering this is Sonoff, a well-known brand for robust electronics. I expect a good working, premium product that just works especially since to use the Sonoff GK200MP2-B, you need the eWeLink application which integrates very well with other Sonoff devices.

Read The Article
How to access BBC iPlayer outside of the UK
How to access BBC iPlayer outside of the UK

You might have found that Hulu is limited to US viewers and the BBC iPlayer is likewise limited to UK IP addresses, however using a very easy to set up proxy server you can access BBC Iplayer, Hulu and many others from any country on all of your internet capable devices such as your Laptop, PC, Mobile Device, Kindle Fire TV, Apple TV, Google Chromecast etc. In this guide you get the ultimate viewing experience when streaming/downloading any type of regional or geo-blocked content online.

Read The Article
The tools, habits, and hardware needed to speed up your computer
The tools, habits, and hardware needed to speed up your computer

Whether it happens gradually over time or all of a sudden, trying to work with a slow computer can be seriously frustrating. Even if you’re fairly diligent with the maintenance of your laptop or PC, it’s surprising how quickly things slow down. If you are asking yourself “Why is my laptop so slow” and running Windows 10, 8, or 7, this post is for you!

Read The Article