The Red Baron
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Si era bruciato il FET e rovinati i contatti meccanici,
è stata un'operazione complessa, visto le dimensioni ridotte, ma alla fine ci sono riuscito a ripararlo!
il guasto si è verificato prendendo un ferro dell'armatura durante un foro su un muro per uno stop,
il bloccaggio probabilmente ha determinato un picco di corrente tale da rovinarlo,
una bella soddisfazione !!!
http://tinypic.com/view.php?pic=zrh4p&s=6
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Google Translate
It was burned ruined the FET and mechanical contacts,
has been a complex task, given the small size, but in the end I managed to fix it!
the fault has occurred taking an iron armature during a hole on a wall to a stop,
the locking probably has determined a peak current such as to ruin,
a great satisfaction!
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DCD710 12V replaceable brushes???
regards
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I figured I better follow up on this.... The new batteries absolutely suck. I have enough of them that it doesnt matter I just pop another one in place. I find that I am charging them twice as much as my old batteries that have nearly 5 years of use. I will just warranty them out every year, as I dont think that they will make it. What a shame leaving behind the a123 cells. I am sure it just wasnt cost effective to have batteries that last forever. If I had only bought a dozen of them back in the day.
A123Systems after 2 years of life
2.3 Ah capacity tests OK
internal cell resistance of 15 mohm to 33 mohm!
compromised power drill!
NICD forever!
regards
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big disappointment! :'(
Dewalt that not only uses A123Systems
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It will be interesting to see where the market goes, Sanyo has new ZT batteries coming out. Almost twice the m AH rating over the current SAX series used by Dewalt, and the energy density doubles. All in the same size cell.
Milaukee and Ridgid are already using similar technology in the Red-Lithium and Hyper Lithium cells, only made by Samsung.
Specs from Sanyo.
I think the maximum is currently A123System utensils,
for discharge current and life cycles
Sanyo UR18650ZT have the C = 2700mAh for a discharge current of 0.54 A
which reduces to about "" "1800mah for discharge current of 5.4 A " "" "
http://battery.sanyo.com/product/lithum-ion/pdf/01/UR18650ZT.pdf
greetings
Chuck wobble Dewalt and Bosch
in Dewalt
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