Natural Science Forum / Chemistry / Electrochemistry / March 2004

I have just replaced a dead NiCd battery on my camcorder, but the new
replacement is a NiNH battery of twice the capcity, and the old one was a
NiCd. As a rule of thumb, could I use my old charger to charge the new
battery?

Why are rechargeable AA batteries 1.2v, instead of 1.5v?
Are there a technology issues behind this?
I have a GPS receiver. When I put freshly charged NiHM AA batteries to
it, it says 'Batteries running low. Need a change.'

I have a Bruan 5414 shaver, 926 stamped where cord enters body. Two years+ old, won't hold a charge or work when
plugged in.
The battery is green, 5 c.m. long, 1.5 c.m. in diameter, marked with HR-AA and underneath, it's either CIH or CTH.
Unsure of voltage.

for school I am searching the history of batteries.
-> Who developed them?
-> When and why?
Sorry for my bad english and greez from Germany.

Can anyone answer why, with regard to AC techniques in electrochemistry,
the use of very small amplitude signals is recomended?
And why is there is no general theory for large amplitude effects and why
would such effects be intrinsically non-linear?

Can anyone tell me how I can acquire a copy of Dr. Bernard A. Boukamp
Equivalent Circuit Program.  I have tried searching the internet, there are
plenty of ref. but not mention of where I can get the program.
Cheers

survey:
1. Who want battery simulation or modelling software?
2.What do you want from battery simulation?
3. How much would you pay?

My sister is looking for batteries for her boyfriends wind generator.
Pref. used, right now he uses 80 6V batteries running the thing. (used
golf cart batteries)  They power the garage and the house.
Any suggestions?

I have a Dewalt cordless drill with a 12 volt battery pack "DW9071" it
hadn't been keeping a charge very long and was used when given to me
anyway...
While experimenting with a home brew charger and what seemed like was going

G'day All
I have a couple of lead acid valve regulated batteries I use whilst camping
etc, had them a few years and they have been in hot ambients. Should I try
to remove the 'venting' cover and check the electrolyte level or is it best

in a experiment of mixing 10cc ethanol and 10cc cyclohexane , it was
found that the temperature drop by 2.5 degree Celsius. what is a
suitable explaination for this phenomenon???
i also want to know which solution is in excess and a suitable