What you get with the Sony a7 III. The kit comes with a camera strap, the much improved NP-FZ100 Rechargeable Lithium-Ion 2280mAh Battery ($78.00US) and a Micro USB cable with A/C adapter. Yes, something vital is missing. Can I use … Continue reading →

Increase the safety of your old two-prong outlets by installing a new ground fault circuit interrupter receptacle. The GFCI will protect against a deadly shock, even if it’s not connected to a ground. We’ll show you everything you need to … Continue reading →

Before choosing security camera power supply, you need to consider the amount of security cameras you have. Say that you own less than four cameras in hand, you can choose 12V or 24V power adapters to offer power supply for … Continue reading →

Current sources are not allowed to be connected together in series, either of the same value or ones with different values. What happens if you put current sources in series? If two current sources are connected in series, then the … Continue reading →

The relationship between voltage, current, and resistance is described by Ohm’s law. This equation, i = v/r, tells us that the current, i, flowing through a circuit is directly proportional to the voltage, v, and inversely proportional to the resistance, … Continue reading →

It used to be used to power the RS232 serial ports, but most newer equipment can supply its own negative voltages internally. So basically, it’s useless for today’s equipment. EDIT: As it it was pointed out, the -12V rail is … Continue reading →

This equation, i = v/r, tells us that the current, i, flowing through a circuit is directly proportional to the voltage, v, and inversely proportional to the resistance, r. In other words, if we increase the voltage, then the current … Continue reading →

The current along the branch with the smallest resistance will be larger than the branch with higher resistance. The total current in the circuit must remain constant (so that charge is not created/lost). So the sum of the currents in … Continue reading →

We measure voltages in a circuit with a voltmeter . The voltmeter is connected in parallel with the component. Do you check voltage in series? Voltage is necessarily measured between two points. It is a measure of the difference in … Continue reading →

Solid lithium (Li) metal anodes in solid-state batteries are replacement candidates in lithium-ion batteries for higher energy densities, safety, and faster recharging times. Such anodes tend to suffer from the formation and the growth of Li dendrites. Will solid-state batteries … Continue reading →

Most plug-in hybrids and all-electric vehicles use lithium-ion batteries like these. Energy storage systems, usually batteries, are essential for hybrid electric vehicles (HEVs), plug-in hybrid electric vehicles (PHEVs), and all-electric vehicles (EVs). Does BMW use lithium-ion batteries? To this end, … Continue reading →

Now comes a battery prototype that can be recharged simply by being left out in the sun. The researchers are calling their concept the Light Catcher, which is basically a photoelectronic battery comprised of tiny anti-reflective solar cells that soak … Continue reading →

Lithium Thionyl Chloride (Li-SOCl2) AA batteries are non-rechargeable batteries, featuring a nominal voltage of ~3.6 volts and a nominal capacity of 2400-2700 mAh. Can Energizer lithium AA batteries be recharged? Can lithium batteries be charged in an Energizer charger? No. … Continue reading →

When we overcharge or overheat lithium ion batteries, the materials inside start to break down and produce bubbles of oxygen, carbon dioxide, and other gases. Pressure builds up, and the hot battery swells from a rectangle into a pillow shape. … Continue reading →

Definition: Voltage of a fully charged cell or battery when delivering rated capacity at a specific discharge rate. The nominal voltage per cell is 2V for Lead Acid, 1.2V for Nickel-Cadmium, 1.2V for Nickel Metal Hydride and 3.9V for Lithium … Continue reading →