Amazon’s Echo smart speakers aren’t just able to connect over Wi-Fi – they are also Bluetooth compatible too. By connecting an Echo speaker via Bluetooth, you’re able to control music playback manually from your phone or tablet. How do I … Continue reading →

Electric motors makes vehicles substantially more efficient than internal combustion engines (ICEs). Electric motors convert over 85 percent of electrical energy into mechanical energy, or motion, compared to less than 40 percent for a gas combustion engine. Why are electric … Continue reading →

How can I increase my Watts? One of two ways (or both): increase the voltage from the source, or increase the amps of the load. Since watts = volts * amps, that will increase the wattage of the circuit. Is … Continue reading →

At last, there’s no doubt when it comes to battery warranties. Thus, when you aim to get a marine battery at Costco, consider yourself safe in the hands of a Costco Battery Warranty. Consequently, the Costco marine batteries are of … Continue reading →

How do LED strips get power? 12 volt LED lights – The LED strip lights need 12VDC power input to run. This will require an AC/DC transformer for in home use, but makes wiring the strips through the house a … Continue reading →

Now that you are left with a dead battery, what should you do with it? First and foremost, do not attempt to recharge it. Alkaline batteries are not designed to be recharged and the process can be quite dangerous without … Continue reading →

To determine how long your battery will last, calculate the battery’s total capacity and divide it by your circuit’s power. Multiply the battery’s reserve capacity by 60. With a reserve capacity, for instance, of 120: 120 x 60 = 7,200. … Continue reading →

Watch your speed To an extent, the faster you go, the more energy you consume – the most efficient speed for electric cars is likely <10mph for most BEVs (depending on static consumption like air conditioning, heating and electrical systems) … Continue reading →

A typical LED uses about 20mA and the capacity of a CR2032 Coin Cell is 200mAh. See below for a battery life estimate: Number of LED(s) in one circuit: 1 – Battery life: 10 hours. Number of LED(s) in one … Continue reading →

Tom: The danger from car batteries is not so much electrocution as it is explosion. If you touch both terminals with a metal wrench, for instance, you can create a spark that can ignite hydrogen gas in the battery. That … Continue reading →

Lithium-ion 14500 batteries and AA batteries are physically interchangeable, but the output voltage difference is rather large (3.6-3.7 volts vs 1.5 volts), which can lead even to the destruction (to say the least) of the user device. Are all AA … Continue reading →

Two Batteries in Parallel, One Charger Batteries connected in series strings can also be recharged by a single charger having the same nominal charging voltage output as the nominal battery pack voltage. Can a battery charge another battery? Yes, all … Continue reading →

40 hours. For example, a high capacity power bank with 20,000 mAh can take up to 40 hours to charge fully. Smaller power banks with 4,000 mAh may only take a couple hours to charge. How many hours is 20,000mAh? … Continue reading →

They have a speakerunder the bumper and it emits a sound when driving at under 19mph in forward or reverse. It kind of sounds like a spaceship sound effect. Tesla is currently working on letting the car talk to pedestrians … Continue reading →

This Is Why. Nuclear catastrophe. The explosion blew out the reactor’s twelve-ton lid—and fuel rods—and ruptured the pressure hull. Can a submarine survive a nuclear blast? Most current submarines can survive at a depth of 400 m, so they might … Continue reading →