[rescue] $35 50gig drives

[Eric Webb]

On Wednesday 11 May 2005 08:50 am, Shirker wrote:
>
> I think the real danger is with end-of-charge detection. NiCd chargers
> most usually use negative delta-V as a means of detecting an end-of-charge
> condition.
>
> When charging a NiMH battery there is no negative delta-V (well, actually
> there is, but it's on the order of microvolts IIRC) and so a NiCd charger
> will tend to just carry on, eventually overheating the battery and
> possibly causing it to burst into flames/explode.
>
> Proper NiMH chargers use zero delta-V as a means of detecting
> end-of-charge.

I thought they used an internal thermistor to detect end-of-charge.  I'm far 
from an EE, this is just hearsay from some EE friends, so I could be way off.


-E.