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An electric battery is a device consisting of one or more electrochemical cells with external connections provided to power electrical devices such as flashlights, smartphones, and electric cars. When a battery is supplying electric power, its positive terminal is the cathode and its negative terminal is the anode. The terminal marked negative is the source of electrons that when connected to an external circuit will flow and deliver energy to an external device. When a battery is connected to an external circuit, electrolytes are able to move as ions within, allowing the chemical reactions to be completed at the separate terminals and so deliver energy to the external circuit. It is the movement of those ions within the battery which allows current to flow out of the battery to perform work. Historically the term "battery" specifically referred to a device composed of multiple cells, however the usage has evolved additionally to include devices composed of a single cell.
Primary (single-use or "disposable") batteries are used once and discarded; the electrode materials are irreversibly changed during discharge. Common examples are the alkaline battery used for flashlights and a multitude of portable electronic devices. Secondary (rechargeable) batteries can be discharged and recharged multiple times using an applied electric current; the original composition of the electrodes can be restored by reverse current. Examples include the lead-acid batteries used in vehicles and lithium-ion batteries used for portable electronics such as laptops and smartphones.
Batteries come in many shapes and sizes, from miniature cells used to power hearing aids and wristwatches to small, thin cells used in smartphones, to large lead acid batteries used in cars and trucks, and at the largest extreme, huge battery banks the size of rooms that provide standby or emergency power for telephone exchanges and computer data centers.
According to a 2005 estimate, the worldwide battery industry generates US$48 billion in sales each year, with 6% annual growth.
Batteries have much lower specific energy (energy per unit mass) than common fuels such as gasoline. This is somewhat offset by the higher efficiency of electric motors in producing mechanical work, compared to combustion engines.
I am looking to sell my Echo 1 JP59 Airsoft Gun. The gun is several years old. It uses a stick battery like the one pictured in the ad. There is no noticeable damage on the gun. It is missing manuals and other documentation. I am unsure if the batteries and smart charger included work.
I have a Ryobi 18v power tool battery charger for sale or trade. It is in like new condition.
$10 or trade for .22lr or .223/5.56 55 gr ammo.
I live in Hillsboro and drive to Lacey or Kent Washington Sunday through Thursday for work, so meeting should not be a problem.
Is there a shop or someone know someone ( Washington County area ) that can replace cell phone battery ?
Got a newer phone about 6 months back ( google pixel 2 ) .
Want to get the battery replaced in the older phone that is a ( motorola Nexus 6 phone ).
The replaced Nexus phone spent it's life...
So recently I purchased a trio of M&P 2.0's one of which being a 3.6" compact. Took them all shooting they worked perfectly using cci blazer. A week later went back out with coated lead reloads, two of the three and my g19 str these beautifully. That said the compact jammed within the first...
I have a 97 PU 5.7 in a GMC.
Its setup with a isolator but when bought only had the one battery. When I bought the truck in 2012 it had this setup. I tested it and it works, but I do not have the extra battery in it.
I have two HD RV deepcells. Question can I use a deep cell as a the alternate...
Hello everyone, looking for some advice here. Back in May of this year my DPMS SASS GII (308) experienced an out of battery discharge as a round was chambering. I contacted DPMS and they sent a call tag and have had the rifle since the start of June. For the last month, I've been calling...
I have a battery I purchased from the interstate store less than a month ago that was installed because I though I needed a new battery but it was the starter/alternator that needed changed instead. Legitimately touching the connectors for 5 minutes, but since it was installed, the store won’t...
We all know of the age old debate of what makes the standard well-rounded firearm battery. This usually includes:
Handgun of some kind
However, for someone that lives in the city (maybe in a condo in downtown Portland) and doesn't hunt, this doesn't seem...
It seems a relative has failed to pay their storage bill and is either homeless or in jail again or something. Anyway, we have been notified by the storage co. that they are going to sell her stuff if someone doesn't come pay the bill.
That leaves the rest of us with the task of cleaning out...
surefire 6p light with surefire battery holder and lanyard. Very bright light, I had it attached to the rail on my ar15 for awhile, it’s in like new condition. $50 for all.
Pick up in Aloha or i can ship via paypal for an additional $5
Time for a new battery again as this one lasted 2ish years. Sure don't make them like they use to it seems. Anyone got a good suggestion on a reliable battery in the $100-$150 range? Its a group 78 size and not looking to spend the $250+ on an AGM or Optima unless its really worth it.
Location: live in Vancouver, work in Tigard.
I have a primary Arms (MD-ADS) micro red dot, push button, 50k hr battery life. Comes with the factory standard low mount, and Radical firearms absolute co-witness aimpoint Micro/PA Micro (same mount) mount. It's in good condition, only...
Battery Free Phone
It's a long ways from being commercialized and they probably cannot solve for the energy requirements of a high-resolution color screen, but it's still interesting!
It reminds me of being a kid. I had one of those Radio Shack electronic-experiment kits. One of the...