hi, @MH Im afraid i disagree with you about the batteries in parallel, ive done that many a time and there's no issue providing that voltages are the same and the 'ah' are the same. If the 'ah' is too radical in difference then they will normally 'equalize' to the lowest 'ah' rating in the pack and your overall current will be that of the lowest rated 'ah' x 2. If you place a 650mah and a 2500mah parallel together then the 650mah will 'drag' the current from the 2500mah down to about 650 but i have never experienced runaway or heating cause there's no overvoltage between them so the electolyte is not getting that stressed over it. This is repeatable and proven through hard physical data.

EEL 

DIITO . . total nonsense . you can put any battery in parallel to get more current if there the same volts . Done it all my life and as a matter of fact most solar systems do this as well . Mine does and it quite happy for the last 15 years .

Gadget 

Quote from: Anothertruthfinder on December 10, 2009, 04:06:32 AM
hi, @MH Im afraid i disagree with you about the batteries in parallel, ive done that many a time and there's no issue providing that voltages are the same and the 'ah' are the same. If the 'ah' is too radical in difference then they will normally 'equalize' to the lowest 'ah' rating in the pack and your overall current will be that of the lowest rated 'ah' x 2. If you place a 650mah and a 2500mah parallel together then the 650mah will 'drag' the current from the 2500mah down to about 650 but i have never experienced runaway or heating cause there's no overvoltage between them so the electolyte is not getting that stressed over it. This is repeatable and proven through hard physical data.

EEL 

Is EE101 MH stuck on how to parallel batteries, LOL?  It takes a rocket scientist to figure it out.     Here's a real example of my AA batteries, which have ~ 50mOhm per battery. Out of 5 good charged batteries, the highest was 1.412V, the lowest was 1.387V. Diff is 0.025 volts. The current is 0.025 / (50mOhm * 2) = 250mA. Oh boy, that's a lot of current, huh MH.  What happens is the batteries in parallel reach equilibrium.

And if someone's afraid of too much current, then discharge the batteries and parallel them.

Paul

The NiMH 2000mAh AA experiment is done, and it's deader than a door nail with only 0.05 volts left while connected across the 10 ohm resistor. The final energy was 6873 joules, which is a bit lower than factory spec, but that's no surprise since they probably cherry pick the best one they could possibly find, and then over charge it. Who knows, that's capitalism at its best,  , but I did not over charge mine.

So, 6900 joules is a good figure for 2000mAh NiMH batteries, and 8600 joules for 2500mAh.

My UC is ~ 550 farads at low voltages (less than 0.4V), and lets just assume it's 650F at 2.7V, for an average of 600F, which comes to 2200 joules. So 6900 J / 2200 J = 3.1 times.

As far as I'm concerned, one can prove a JT is cop>1 without doubt by either self-running, or by using one 2000mAh to 2500mAh NiMH battery to charge a BCAP0650 4 times. I'll try doing this today to see how many times my first JT can charge the BCAP0650. ... How long will it take to do this. I mean, discharging the AA battery at 130mA took nearly one day. Albert, what is the maximum current I should use for my JT?

Regards,
Paul

Paul .
I am so glad to have that logger setup . . there is still an unseen factor and that is the BEMF being collected with diode at the c e junction . that diode add to the total power coming from that's junction that would normally be wasted in conventional electronics as described by john bedini in his experiment over the past 30 years or so . It is here where the magic really begins and the REAL magic is that an ultracap can convert that into real energy . If there was an icon praising you i would use it . AND you were an unbeliever  and i am so glad to went the distance and got you a good cap .
Stephan !  I recommend Paul Should be put as an elite member for his courage and extream efforts to prove me wrong OR right . Any one second this motion  ?
edit .. Oh i see you are already an elite Member ..

Also it ain't over till the fat lady flys ! If you could adjust your Jt to  draw less than 20 ma and measure your V and I after the diode so i can get an idea of how close you are to My setup . Should be  13 ma in and between 5-21 volts @5 ma out . this does include part of the flyback being captured and allows  Hv spikes to still come thru . Then hook you bcap to it  and log .I would love to see one of those pretty graphs of you work so far and i might ask if i can use them in descriptions in My pdf for the OU prize ? IF i win you will certainly get a percentage of the money . If not then you will still be included in access to a factory board for your private use and receive credit where its due and i consider you a valuable member to this project and  a member of our group efforts.  I didnt inven the Jt  nor the Bcap . all i did was put the pieces together . Explanations are beyond me except for the ones i have described and  i need your expertise  . As far as having a 2000mah battery i am using a 2500mah and have kep one running ver 16 days and recharged the bcap 7 times above unity of teh source . battery remains at 1.300 where i regenerate it with the light bulb regulator . I forgot one time to unscrew it and the battery got a bit higher and the bcap went to 1.385 but today's its back up to 1.8 and the battery is holding its own at 1.3 -1.299 . next recharge about lunch time .

Albert