batteries

  1. M

    where can i get good rechargable digital camera batteries from?

    my camera takes AA batteries and atm i use jessops 2700. i charged them up recently and they had died basically. thats the second pair of jessops that i have had to replace. i would ideally like some with a high number like 2700, the higher the better i guess im in the uk thanks g.d not...
  2. S

    How long do I charge a 12 cell group of NiMH Batteries?

    I have just had a large remote control boat constructed which will run on a group of 12 NiMH batteries. I have bought a charger pack for it but am unsure of what voltage to charge them at in order for it to be safe. Any advice would be greatly appreciated.
  3. S

    Batteries dying in cold weather?

    I've got a wireless temperature gauge. The remote yet goes outside, and then the unit that displays the temperature goes inside. I've found that the batteries in the outdoor unit die extremely fast and it seems to be related to cold temperatures. So, should cold temperatures, down to about...
  4. U

    Why do batteries have to be in opposite positions when next to eachother in a

    remote control for example? like the batteries in a remote control. the batteries are in opposite positions. the positive and negative are facing different ways. why is this?
  5. A

    How do i convert 4 AA batteries to output 9v?

    i need 4 AA batteries to output 9v for lego mindstorms i can only use 4 AA batteries and i cant use 9v batteries either
  6. L

    Can I use car batteries to run a refrigerator?

    with a converter of course. My question though is this possible, to take 2-3 car batteries and have them running through a converter that converts into AC-DC wall outlets. Is this dangerous, also if not how often would I have to re-charge my batteries?
  7. A

    I want to know if laptop batteries are universal?

    I'm planning on buying an alienware M17. It comes with a battery but I know they eventually die. I want to buy an extra battery but it is very expensive on their website. Plus when the second battery dies, I will have to buy another but I'm not sure if batteries are universal or what? It uses a...
  8. J

    how i can charge different capacities Batteries such as 3Ah,7Ah,21Ah in one charger?

    Battery chaging in series
  9. B

    The average cost of batteries?

    What is the average cost of a AAA duracell battery,AAA alkaline battery, and Sunbeam battery
  10. W

    When do I get rid of rechargeable batteries?

    I have a pair of "Ultra" brand 850mAh rechargeable batteries. They are nearly 10 months old I would guess and have been recharged nearly every 2 days. I also have a pair of 500mAh batteries that came with my headphones. Ok... The 500s still charge pretty fast and the 850s used to take about...
  11. eee

    Where can I buy extremely long lasting batteries?

    AA batteries are what I'm looking for. Not rechargeable batteries.
  12. S

    When we change batteries on a graphing calculator, will we lose the memory?

    I wanted to know i if i might lose all the data and memory in the graphinc calcuator if i change the battery. what will happen if the calculator is on? off? i have a TI 83plus
  13. Z

    how do i recharge - rechargable batteries without a charger?

    well guys recently my charger has been giving off weird goo like crap from the bottom, ive been using these batteries for 2 days so far.. my mom found them randomly without buying them newly.. the "model" of rechargable battery is PureEnergy.. well any ways, ive been using these for 2 days, and...
  14. C

    My batteries leaked... how do I clean this up?

    and its residue is all over my hands and my remote control. There's like white icky stuff around the inside surface of the cap. and the batteries liquid/fluid crap is all over my remote and its on my floor.. how do I clean this mess up? YES, I threw away the batteries. Are you sure its safe to...
  15. A

    What can you do with Li-ion batteries?

    I took apart my old 1st gen iPod shuffle and my old cellphone because they were broke and I was bored (they're not giving me enough hw in college obviously). They both have li-ion batteries and I was just wondering if there is anything I can do with them that doesn't include throwing them in the...
  16. M

    portable dvd players use just batteries to watch?

    i am going away on a roadtrip and want a portable dvd player for daughter for the ride. my cig lighter in the car doesnt work so i was wondering if portable dvd players run off of batteries without the cord being plugged in or do they all need the cord that is to be plugged into the lighter. any...
  17. M

    Batteries becoming super hot. Normal or not?

    I bought this portable speaker for my phone in a flea market. When I put in my batteries, it became super hot. Is it normal? I used those cheap batteries instead of good ones. And uh.. just now, when I try to put the batteries again, it wasn't as hot as before. Still hot though. And the portable...
  18. N

    Is there a device that runs on batteries that allows you to plug into it, a wall

    plug? I've never heard of one, seems ridiculous, but is there such thing? And if so, where can i get one?
  19. 7

    What is a memory effect with batteries?

    I read that nickel cadmium batteries can exhibit a memory effect and I'm wondering why and how.
  20. F

    Do blue tooth use batteries?

    Not the plug.
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