Jump to content
Electronics-Lab.com Community

Micro battery charger


spacifique1
 Share

Recommended Posts

  • 1 month later...

Hi Prateek,
You spell spacific like a blue-blooded Frenchman!
Check-out www.energizer.com and click on Technical Info. They have tiny button and coin shaped battery cells, some that use lithium. They have a shelf life of at least 10 years and pack a lot of lightweight endurance.
They also have expensive AA size lithium cells (1.5V, most other lithium cells are 3V) that have a very flat voltage over their life and they claim they can take many times more digital pictures than alkaline cells. ;D
 

Link to comment
Share on other sites

HI AUDIOGURU!
A BOOK ON PHYSICS BY "RESNICK AND HALLIDAY" SHOWS A CAPACITOR BEING USED IN A MEDICAL DEFEBRILLATOR BY A DOCTOR AND THEN IT EXPLAINS ITS ANALOGY WITH THE SPRING.HOW IS A CAPACITOR DIFFERENT FROM A BATTERY IN OPERATION?
(MORE SPECIFICALLY A RECHARGEABLE BATTERY)
CAN IT REPLACE A CAPACITOR IN CIRCUITS?
::)
PRATEEK

Link to comment
Share on other sites

Hi Prateek,
The choice of using a rechargable battery or super-capacitor (many Farads) depends on their strengths and weaknesses:
1) I have some 1W walkie-talkies that use three rechargable AAA Ni-Cads. Each charge powers them for about 6 hours if I don't transmit much. For the small size and weight of the battery it has a lot of power/endurance. But if I charge them then don't use them for a few months, the batteries are dead and needing a recharge due to self-discharge.
2) I have a telephone answering machine and other items with super-capacitors that hold their charge and therefore power the low-current memory for a very long time. But I don't expect the 1.0 Farad capacitor to power my walkie-talkie for longer than a few seconds.
3) I use rechargable Ni-Cad and Ni-MH batteries in flashlights. They stay bright until the end of the charge because the batteries have a very flat voltage during discharge. I wouldn't use a re-chargable battery as the capacitor in a timer circuit where the time period is determined by the reduced voltage of the capacitor as it sharply drops during discharge. ;D 

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
 Share

×
  • Create New...