The red LED and blue / green vacuum fluorescent displays consumed a lot of power and the calculators either had a short battery life ( often measured in hours, so rechargeable nickel-cadmium batteries were common ) or were large so that they could take larger, higher capacity batteries.

The lead acid battery was the first practical secondary ( rechargeable ) battery that could have its capacity replenished from an external source.

These could be warships carrying their principal battery of carriage-mounted guns on a single deck or on two decks ( with further smaller carriage-mounted guns usually carried on the forecastle and quarterdeck of the vessel ).

A battery of four BM-13 launchers could fire a salvo in 7 – 10 seconds that delivered 4. 35 tons of high explosives over a impact zone.

Reloading was executed in 3 – 4 minutes, although the standard procedure was to switch to a new position some 10 km away due to the ease with which the battery could be identified by the enemy.

Submerged, the ship could manage 50sm at 5 knots using battery electric propulsion.

The joint Apple / CPSC press release stated that an internal short could cause the battery cells to overheat, posing a fire hazard.

DC had the advantage that large battery banks could maintain continuous power through brief interruptions of the electric supply from generators and the transmission system.

Because the two parts of the crystal were in contact with each other, the electrons could be pushed out of the conductive side which had extra electrons ( soon to be known as the emitter ) and replaced by new ones being provided ( from a battery, for instance ) where they would flow into the insulating portion and be collected by the whisker filament ( named the collector ).

Outdoor environment could mean extreme cold, in which case the outdoor UPS system should include a battery heater mat, or extreme heat, in which case the outdoor UPS system should include a fan system or an air conditioning system.

It is possible for a UPS unit to be incompatible with a generator or a poor mains supply ; in the event that its designers had written the microprocessor code to require exactly a 50. 0 Hz or 60. 0 Hz supply frequency in order to operate, the UPS could remain on battery power, being unwilling to reconnect to the fluctuating input.

Having fully static RAM and a processor whose clock could be frozen without losing state meant spectacular battery life, measured in weeks or even months.

Garry Wills observes that the pace of production " overwhelmed " any possible response: " Who, given ample time could have answered such a battery of arguments?

One amplifier, the professional audio model DC300 made by Crown International beginning in the 1960s, did not have high-pass filtering at all, and could be used to amplify the DC signal of a common 9-volt battery at the input to supply 18 volts DC in an emergency for mixing console power.

Extrapolation beyond is not linear since other failure modes, caused by decreasing charge acceptance resulting in positive electrode swelling and thermal instability, could control the battery life.

If one animal who is lying in a battery egg farm cage could have the extra room to stretch her wing today because of something you've done, I think she would choose to have that happen.

The theorem was originally misunderstood ( notably by Joule ) to imply that a system consisting of an electric motor driven by a battery could not be more than 50 % efficient since, when the impedances were matched, the power lost as heat in the battery would always be equal to the power delivered to the motor.

To achieve maximum efficiency, the resistance of the source ( whether a battery or a dynamo ) could be made close to zero.

Sturgeon displayed its power by showing that although it only weighed seven ounces ( roughly 200 grams ), it could lift nine pounds ( roughly 4 kilos ) when the current of a single-cell battery was applied.

The process could also be seen as analogous to cycling uphill or charging a battery for later use, as it produces potential energy.

Because of the mechanisms used by signaling methods prior to SS7 ( battery reversal, multi-frequency digit outpulsing, A-and B-bit signaling ), these older methods could not communicate much signaling information.

The voltage / current induced by the geomagnetic storm could have led to diminishing of the signal, when subtracted from the battery polarity, or to overly strong and spurious signals when added to it ; some operators in such cases even learned to disconnect the battery and rely on the induced current as their power source.

Continuous low-level lighting may be provided in the shelter by means of a 4-cell hot-shot battery to which is wired a 150-milliampere flashlight-type bulb.

With a spare battery, a source of light for 2 weeks or more would be assured.

At a minimum, recording -- usually on tape, which is now in wide professional use -- brings the psychiatric interview alive so that the full range of emotion and meaning can be explored repeatedly by the therapist or by a battery of therapists.

There is no distinction made in Scotland between assault and battery ( which is not a term used in Scots law ), although, as in England and Wales, assault can be occasioned without a physical attack on another's person, as demonstrated in Atkinson v. HM Advocate wherein the accused was found guilty of assaulting a shop assistant by simply jumping over a counter wearing a ski mask.

In common law states an assault is not committed by merely, for example, swearing at another ; without threat of battery, there can be no assault.

Violations of the law against hubris included what would today be termed assault and battery ; sexual crimes ranging from forcible rape of women or children to consensual but improper activities ; or the theft of public or sacred property.

In the latter case a battery observation team can order fire to their own battery and may be authorised to order fire to their own battalion and sometimes to many battalions.

These can be used for energy meters ( watt-hour meters ) or for estimating the charge of battery or capacitor.

In many areas, battery expenses can be eliminated by attaching the building to the electric power grid and operating the power system with net metering.

In areas that lack access to the grid, battery size can be reduced by including a generator to recharge the batteries during extended fogs or other low-power conditions.

There are 12 power events ( such as standby, suspend and resume requests, and low battery notifications ), plus OEM-defined events, that can be sent from the APM BIOS to the operating system.

It may be, for example, the standard elements for a contract or the technical definition of battery.

Unlike standard DECT, the low power variant enables this standard to be used in battery powered devices such as smartphone app controllable home automation or security systems.

The standard has been created to enable home automation, security, healthcare and energy monitoring applications that are battery powered and can easily connect to the web using the large number of existing DECT enabled modems and be managed using a smartphone app.

The battery is a versatile and very common power source which is ideally suited to many applications, but its energy storage is finite, and once discharged it must be disposed of or recharged.

The flow battery, an experimental type, offers the option of vastly larger energy capacity because its reactants can be replenished from external reservoirs.

They may be powered by direct current ( for example a battery powered portable device or motor vehicle ), or by alternating current from a central electrical distribution grid.

Most electric lighting is powered by centrally generated electric power, but lighting may also be powered by mobile or standby electric generators or battery systems.

In a power amplifier this not only wastes power and limits battery operation, it may place restrictions on the output devices that can be used ( for example: ruling out some audio triodes if modern low-efficiency loudspeakers are to be used ), and will increase costs.

Current advances in energy storage allow for energy densities as high as 2. 5 MJ / m³, which means that a battery delivering 32 MJ of energy would require a volume of 12. 8 m³ ; this is not a viable volume for use in a modern main battle tank, especially one designed to be lighter than existing models.

Kites can be used to carry light effects such as lightsticks or battery powered lights.

Other sources of scrap lead, such as recovered bullets, lead cable sheathing, lead pipe, or even lead – acid battery plates, ( EXTREME caution should be used as modern battery components, when melted can yield hazardous, even deadly gases ) can yield usable lead with some degree of effort, including purification and measuring of hardness.