As we all know dry cells are non-rechargable cells and pencil cells (which are commonly used in remotes),some of them are rechargable.
What makes some pencil cells rechargable while other ones non-rechargable? [Electrochemistry]
Answers
Answer:
Rechargeable battery vs regular battery
There are plenty of options out there, but which one’s right for you?
BY JEFFREY BAUSCH
While most people are familiar with regular batteries and rechargeable batteries, there’s still some confusion when it comes to the appropriate application of one over the other. To make the decision a bit easier, it helps to have a basic understanding on the differences between the two.
Battery 101
Both batteries produce energy through an electrochemical reaction that involves an anode, cathode, and electrolyte. When the battery is discharging energy, the anode is the negative terminal and the cathode is the positive terminal. These two components, referred to as electrodes, occupy the most space in a battery and are also where the chemical reactions occur. When they are connected to an electrical conductor, an electrical charge flows freely between them, from anode to cathode. The medium that supports this flow of charge is the electrolyte.
The difference between both batteries is that the chemical reaction is reversible with a rechargeable battery: when electrical energy from an external source (e.g., a charger) is applied to the battery’s secondary cell, the negative-to-positive electron flow that occurs during discharge gets reversed. As this happens, the cell’s charge gets restored.
While certainly convenient, it’s important to remember that rechargeable batteries will not last forever. They do eventually die, though it typically takes several hundred charges before this actually happens. Since their introduction, though, some users have found ways to speed this process up:
• Use the wrong charger/overcharge
• Use the battery in the wrong application
• Store the battery improperly
Various voltages
While both batteries produce energy the same way, their chemical compositions are vastly different. This has a direct effect on the amount of voltage produced. Most modern-day devices can compensate for minor differences in voltage (a common one is 1.2 and 1.5 V), but since there are so many “chemically different” regular and rechargeable batteries out there today, we won’t get into the specifics of what combinations produce how much voltage. The simple solution: know how much voltage your device needs, then pick out the appropriate battery.
Comprehending capacity
A battery’s capacity is expressed in Ampere-hours (Ah). This dictates the period of time that it will be able to provide a given current. The greater the capacity, the longer the battery will last.
Capacity is affected by three things: the type of battery, number of components within the battery, and its construction. Every manufacturer has its own way of measuring capacity, but for the sake of providing an example, let’s look at the capacity of an alkaline (regular) battery. They’re approximated at anywhere between 700 and 3,000 mAH. This means that a digital camera that uses 1,000 mA of electricity could technically operate under constant use for 6 hours with two AA batteries.
When it comes to rechargeable batteries, though, you should keep in mind that the numbers indicated by the manufacturer are those seen under optimal conditions. Naturally, this varies depending upon the actual conditions of use. Factors like temperature and current-used have a large impact in determining just how long it will last. When purchasing a rechargeable battery, consider these elements — it’ll save you a ton of frustration.
The environment
The benefit to using rechargeable batteries is that it cuts down on the amount of regular batteries that you use. This, in turn, reduces the amount of environmentally harmful regular batteries that get thrown away.
What most people do not consider, however, is that most rechargeable batteries, like their regular counterparts, contain toxic and rare substances. As such, they also need to be recycled properly. This is especially easy to do nowadays, as a broad range of retailers, from Target to Best Buy and Sears to Home Depot, now offer some form of battery recycling program.
Snapshot comparison: Alkaline vs lithium-ion
Two of the more popular forms of these batteries are the alkaline battery (regular) and lithium-ion (rechargeable) battery. Compared side to side, you can see some of the sharp differences between both forms of battery:
Alkaline “Regular” Battery
Lithium-ion “Rechargeable” Battery
Conclusion
Choosing one battery over the other is not as hard as it may seem. It just comes down to usage and cost: how often will the battery-powered device be used, and how much energy does it consume? From there, you can make a rational decision as to which type of battery is most appropriate for your application. ■
Related Products: Batteries
HOPE THIS ANSWER HELPS YOU ☺
Answer:
The main difference between rechargeable and non rechargeable batteries is that rechargeable batteries can be put to use again after have been fully discharged once, while non rechargeable batteries cannot be charged again once they discharge fully.
Explanation:
In simple terms, a battery delivers energy it has previously stored, while a fuel cell converts the energy from a fuel to electricity. Conventional generators also produce electricity from fuels, but fuel cells generate it directly through a chemical reaction.