Can (disposable) Alkaline Batteries Really Be Recharged (safely)?
452810
No, it's not true. You'll destroy your charger. \nAlkaline batteries are not designed to be charged.
249044
"Their intention is to try to make them last longer prior to use. I think everybody has had the experience of putting a bunch of batteries in a flashlight and then putting it in the trunk of their car, and they go back when they need the flashlight and it doesn’t work. Because just on standing, batteries actually deplete themselves. So the idea is that there’s a certain amount of chemical inside—it’s a chemical reaction that’s taking place in the battery—and the chemicals basically get used up. They basically just run out of active material.\n\nMost chemical reactions are affected by temperature, and the lower the temperature the slower the chemical reaction. So what people are trying to do is slow down the self-depletion mechanisms of the batteries by keeping them cold.\n\nIn general, it does extend the battery’s life. Whether there’s a significant difference that would be measurable to the consumer between room temperature and a refrigerator.... To be honest, I don’t know. But in general it does work—that if batteries are kept cooler while they’re not in use it will extend their shelf life.\n\nSo then what about the freezer? Is it even better?\n\nI think one would have to be careful about that. Because it’s the freezer, and the freezer is quite cold. Depending upon the type of batteries, you can actually freeze some of the internal components, and that would not be good. So probably the refrigerator is a safe bet and it will improve things a little bit.\n\nWhat if there are batteries that you’ve been using but will not use again for a while. Would placing them in the fridge in the meantime help at all?\n\nYeah, if you plan on storing them for a long time, it probably would. I think typically people put them in the refrigerator before use. Certainly people should not try to use the battery or activate the battery while it’s cold. It may not work very well. But if they let it warm up before they use it, it should help. \n\nWhat about batteries that are starting to run low?\n\n\nNo, that won’t help. When they start to run low they’re basically used up."
558632
Yes it is perfectly safe, The device will only draw the current it requires. So as long as you are providing at least 300mA the device will operate without being damaged.
819237
Should be able to get sulpuric at a car factors that sell dry batteries
60886
(hm hm condenser...you must be old school)well we can and kind of have in ways. Helmholtz described charge starge devices that are largely used today as "batteries" for memeory backup. such a charge storage device has great capacity and unlike the capacitors it can be put in series to increase bothe input and output voltage. the internal dielectric is not very great so there is considerable leakage compared to a tradition electrolytic. the scheme used today comprises as a layer of activated charcoal a dielectric layer and then another charcoal layer. you can buy these easity in small units that are as muc as a few fards and a few voltas. \nwhen the lighting strikes, though, the power factor is so low that the internal wiring are likely to burn out. there is c acomapnay, (i dont remember the name), is designing such "batteries" as a methos for propelling vehicles. i think the name of the comapny is Maxwell (not be confused with Maxell).\ni personally have experimented in creating such batteries that store energy as dc but when released it is AC! such a battery would be used in vehicles with more efficient motors and safer too. An ac battery of course would require controls and would use similar schema as what Helmholz described.....\nthere is a great book on Helmholz publised by UC press that leaves one to think that this amn knew way more than einstein ever did and his genius out stripped einstein and leaves him in the dust.\nalso one does no need lightning. therer are enough free electrons in the air to creat a good chrage over time. take a CRT from stock never used is ok, and touch the anode dimple. knocks you right back. that is a charge from the air.
684501
Alkaline batteries contain basically Manganese Oxide and Dioxide coupled with Zinc oxide.  Manganese and zinc are known as transitional metals not alkali metals or alkaline earth metals.  The reason why alkalines batteries are called alkaline batteries is due to the potassium hydroxide electrolyte.  \nMixing an alkali or alkaline earth metal with a halogen will produce a salt known as a ionic salt.
1014625
lithium batteries are better in any electronic, they don't have to be totally drained before recharging them.
502133
Short circuiting the battery is not a good idea, but it should not explode or leak "acid" as you suggest.  It is actually incorrect to call the inner contents of a standard 9 volt batter "acid" since there is actually no "acid" inside.  Most standard batteries are called "alkaline".\n\nThe wire placed acrocess the two leads of the battery has very little resistance...almost zero (but not quite zero, just a tab above).\nAccording to Ohm's law,\nV = R*I\nwhere V is the voltage, R is the resistance, and I is the current, you can see that with a very small resistance, a very large current will be drawn.  This large current will heat up the wire. Depending on just how much current and the type and thickness of the wire, the wire may or may not begin to glow or melt.\nSoon after shorting out the batter (within a few minutes) the battery will be dead.  An aweful waste of a battery in my opinion.
824113
Yup,\nDepends on the type of batteries (AA, C, or D) and how they are wired together series, parallel or a combination.  Most batteries are 1.5 V per cell.  If they're in series, add the voltage, if they're in parallel, they're there for available current or increased battery life.  The gadget may have some name plate data on the box or the device that says what the voltage and current requirements are.\n\nAnyhow a trip to Radio Shack and a little bit of wiring is all you need.  They have a couple of universal AC to DC transformers you can plug into the wall.
444213
Wow, there seems to be some differences of opinion on this one. Well perhaps I can help clear up some of the mystery.  I have actually done quite a bit of research on this topic.\n\nThere is this thing called "battery memory".  It doesn't actually have anything to do with memory, what it refers to is the battery's ability to hold a charge.  If a battery is not discharged all the way before it is recharged it starts to develop a "memory" of the amount of discharge. It doesn't happen right away but eventually it gets to the point where the battery will no longer charge to the full capacity it used to have.\nDifferent battery types are effected by this different amounts.  Alkaline batteries are severely effected by it. Lithium Ion batteries (the kind in a laptop) are not nearly as effected by it but are still a little effected.\nThere is something else to consider however.  All batteries, especially lithium Ions and most especially cheap lithium Ions loose there charge over time, even when they are just sitting being unused.  This means that every few hours or even every few minutes depending on your battery and laptop, the battery charger kicks on to get the battery back to 100%.  This rapid charging and discharging will quickly hurt the batteries life.\nOf course this is only one of many things that can and will effect the life of your battery.  The manual to your laptop should have care instructions for it.  Usually it recommends running on the battery and draining it completely dead then doing a full recharge around once a month.  This will help stop "battery memory".
40400
No. However, it will make the battery last a tad longer than if you left it out at room temperature. \n\nBasically, your battery is storage for electrons. If you just leave a battery out, those electrons will try to ground themselves (leave) from the battery. The more you lose, the less enegy there is in the battery. Most smaller batteries are dry cells. The free elctrons are formed from chemical reactions within the battery itself. \n\nPutting batteries in the freezer will not re charge it, but it will slow down the chemical reactions so that not s many electrons are wasted. \n\nSUMMARY: Freezing your batteries won't recharge it, it will help them retain its charge if left un-used.
214082
A lot of airlines have blocked off those little plugs - they don't want people plugging stuff in due to fire hazard.  You should call the airline, or see about spare batteries.  Personally, I don't think your PSP would be too much of a hazard, but if something goes wrong, help is a long way away...
358273
http://www.howstuffworks.com/battery.htm
532957
Rechargeable lasts longer in digital cameras and such.  Regular AA batteries will die in like 20 minutes if not before.  They just drain real quick.  Buy the rechargeable and get a battery charger.  They are cheap.
746321
no u can use the ac power supply it wont hurt it cause that's how u recharge the battery so don't worry about it just use it like that
480094
Always use the best and most powerful I use Duracell Plus, don't use rechargable if avoidable
942396
Because I'll bet you let it sit all summer without ever using it or charging it, right?\n\nLead-acid batteries have to be regularly discharged and recharged to retain their ability to work.  If you go two or three months just letting a battery sit, it's done for.\n\nAfter you buy your new one this year, and when the season is over, here's what you need to do:  every two weeks (at LEAST), fire up the snowmobile and run it for a while.  Then put the battery on an automated trickle-charger -- if you get one that has a "maintenance mode," so much the better, you can just leave it on all the time, and the charger will maintain the battery for you.\nIf you do the above, your battery will be ready to go the next winter, and will last at least 4-5 years, probably more.