Posted: Mon Nov 02, 2009 9:39 pm
by EVan
ChrisB wrote:All that is needed is a battery that is healthy - a new battery one one which tests OK on one of those cheap resistor testers will be perfectly fine, even if it's a bit flat. Batteries that have been allowed to sit dead flat a few times are the problem (as they have such high internal resistance that they may as well not be there).
So whats killing the DC-DC then, is it the millisecond spikes that causes them to fail if the 12v isnt good or even connected ??
ChrisB
I think so, could be that the current limit isn't fast enough.
Posted: Mon Nov 02, 2009 9:53 pm
by ChrisB
EVan wrote:ChrisB wrote:All that is needed is a battery that is healthy - a new battery one one which tests OK on one of those cheap resistor testers will be perfectly fine, even if it's a bit flat. Batteries that have been allowed to sit dead flat a few times are the problem (as they have such high internal resistance that they may as well not be there).
So whats killing the DC-DC then, is it the millisecond spikes that causes them to fail if the 12v isnt good or even connected ??
ChrisB
I think so, could be that the current limit isn't fast enough.
Ah I see.
ChrisB