Recent developments include batteries with embedded functionality

Aug. 4, 2011 - PRLog -- Recent developments include batteries with embedded functionality such as USBCELL, with a

built-in charger and USB connector within the AA format, enabling the battery to be charged

by plugging into a USB port without a charger,and low self-discharge (LSD) mix
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chemistries such as Hybrio,ReCyko, and Eneloop,where cells are precharged

prior to shipping.
Battery cell types
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There are many general types of electrochemical cells, according to chemical processes

applied and design chosen. The variation includes galvanic cells, electrolytic cells, fuel

cells, flow cells and voltaic piles.
Wet cell

A wet cell battery has a liquid electrolyte. Other names are flooded cell, since the liquid

covers all internal parts, or vented cell, since gases produced during operation can escape

to the air. Wet cells were a precursor to dry cells and are commonly used as a learning tool

for electrochemistry. It is often built with common laboratory supplies, such as beakers,

for demonstrations of how electrochemical cells work. A particular type of wet cell known as

a concentration cell is important in understanding corrosion. Wet cells may be primary cells

(non-rechargeable) or secondary cells (rechargeable). Originally, all practical primary

batteries such as the Daniell cell were built as open-topped glass jar wet cells. Other

primary wet cells are the Leclanche cell, Grove cell, Bunsen cell, Chromic acid cell, Clark
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cell, and Weston cell. The Leclanche cell chemistry was adapted to the first dry cells. Wet

cells are still used in automobile batteries and in industry for standby power for

switchgear, telecommunication or large uninterruptible power supplies, but in many places

batteries with gel cells have been used instead. These applications commonly use lead-acid

or nickel-cadmium cells.

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One of the worst things that can happen while working on a laptop is to have your Laptop Battery die mid-project. To avoid this, it's good to know how much life your battery has left in it.