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An electric battery is a device consisting of one or more electrochemical cells that convert stored chemical energy into electrical energy

3
votes
battery with high ionic resistance you will find it runs fast for a few seconds but then slows down. The effect is more prominent on batteries near their end of life. …
answered Nov 30 '10 by Thomas O
3
votes
2answers
Got an old 12V UPS battery, a sealed lead acid 17.2Ah battery. Quite a nice YUASA battery. Unfortunately it reads 9.92V so has been discharged badly. Is there any chance of salvaging it?
asked Oct 18 '10 by Thomas O
3
votes
Most batteries and cells are fairly well sealed. They'll be fine. You might want to clean off the terminals to ensure they don't corrode during normal use, but otherwise they should work. …
answered Mar 12 '11 by Thomas O
0
votes
5answers
I'm looking for a device which monitors a 3.3V line. When the line drops below, say, 2.7V, I would like it to switch power over to a battery backup (3V lithium coin cell.) It would also be good if it …
asked Nov 3 '10 by Thomas O
19
votes
4answers
What is the current state of things when it comes to super capacitors and batteries? Are super caps anywhere near rivalling LiPo's in capacity? I've often heard people talking about super caps as … being a viable replacement for batteries, in that you can charge virtually instantly and recharge millions of times, but is this just a pipe dream? …
asked Oct 25 '10 by Thomas O
9
votes
Messing with lithium ion (LiIon) and lithium ion polymer (LiPo) batteries is a very dangerous thing to do and will likely result in fire and flames. LiPo and LiIon fires are VERY dangerous …
answered May 25 '11 by Thomas O
16
votes
I'll compare against alkaline AA's and lithium CR2032's as these are the most likely candidates to replace each other. However, they have several differences: Coin cells are usually 3V, instead of 1 …
answered Oct 26 '10 by Thomas O
9
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The datasheets. For example, here is the datasheet for Duracell Plus AA (retail) batteries: http://www.farnell.com/datasheets/97133.pdf If you do some searching around on the websites of Duracell …
answered Oct 24 '10 by Thomas O
8
votes
A battery has an internal resistance. The pulses of current drawn by microcontrollers and other digital logic can cause dips in the battery voltage. A bulk decoupling cap (10µF or so) across the power …
answered Oct 29 '10 by Thomas O
12
votes
1answer
I am in need of a way to charge a 3.7V li-ion cell (probably an 18650 type) from a 4.5V - 20V input. That's not a problem, there are plenty of (switching) battery chargers around with that kind of ope …
asked Oct 24 '11 by Thomas O
0
votes
Just a guess, but perhaps it forms a makeshift switch? Disconnect to stop charging.
answered Feb 4 '11 by Thomas O
0
votes
Many RC aircraft batteries can be run at 20 or 30C continuously, but those are specifically designed to do so. I wouldn't imagine a C rating exceeding 1C for a consumer battery, like the CCTV camera. …
answered Apr 6 '11 by Thomas O
2
votes
The Atmegas are rated to 5.5V. I have run PICs on 6.5V with no problems, but I did not test them for a long time, nor did I verify they met all their specs. I suppose if it was a little toy, you could …
answered Feb 4 '11 by Thomas O
5
votes
This Battery University page recommends you store them at 40% charge.
answered Dec 17 '10 by Thomas O
3
votes
It can in fact be very important! The charging voltage of a 3.7V LiPo or LiIon is 4.2V, but for a 3.6V one it is only 4.1V! You could easily damage a 3.6V LiIon cell by charging it to 4.2V.
answered Aug 1 '11 by Thomas O

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