Re: Li-Ion Life

Steinar Mathiesen wrote:
> Agree with Mike, and check your insurance.
> The only reason this have not blown up (yet) is the 150 ohm resistor,
> limitting charging curent to ca 100mA.
> Using 4 Li Ion cellgrups in series, without safety electronic are not
> recomended.
> Steinar
>
>
> "mike" <[EMAIL PROTECTED]> skrev i melding news:[EMAIL PROTECTED]
>
> > Seriously, you should read up on now (not to) charge Lithium batteries.
> > And put on your safety glasses.
> > mike
> >
> >
> > --
> > Bunch of stuff For Sale and Wanted at the link below.
> > laptops and parts Test Equipment
> > Honda CB-125S
> > TEK Sampling Sweep Plugin and RM564
> > Tek 2465 $800, ham radio, 30pS pulser
> > Tektronix Concept Books, spot welding head...
> > http://www.geocities.com/SiliconValley/Monitor/4710/

Well,I'm not too worried about it,they don't get warm when I charge 
them,and nothing has melted yet,soo....Granted,it might not be the best 
way to charge them but the cell's havn't complained yet.I've got each 
string of cells isolated from one another by a series diode on the + 
terminal,to the "output" so each string is somewhat independant,except 
for the (two) 150ohm current limiting resistors between the series 
strings.So each string of cells supplies power out though a diode,and 
charges through a resistor.To charge them I either connect the 4 watt 
solar panel for a day or two,or switch on the 12V power supply for a 
bit.It's been working great this way for,about 6 months now.I figured 
the cells were near death anyways,and just threw the pack together for 
some "backup" incase the power went out,I didn't figure they would last 
very long,but they seem to be holding up quite well,despite a bit of 
abuse,so all in all,I'm a happy camper!