Battery Power Supply

[nige2000]

cant see what use it would be?

[sima66]

cant see what use it would be?

Lol......neither do I, but I hoped that maybe someone will! :)

Being able to supply SSD with 3.3v, in my case will be a nice improvement!

[sima66]

I had my PC completely disconnected from my PS and my batteries from the 3.3v charger.
I have 4 A123 batteries and all switches were OFF!
In less than a week my voltage dropped to 2.2v!!!

How is that possible?!

[nige2000]

I had my PC completely disconnected from my PS and my batteries from the 3.3v charger.
I have 4 A123 batteries and all switches were OFF!
In less than a week my voltage dropped to 2.2v!!!

How is that possible?!

cant see how thats possible
you had ps disconnected and pc disconnected?
and all thats left is 4 cells connected in parallel?

[sima66]

I had my PC completely disconnected from my PS and my batteries from the 3.3v charger.
I have 4 A123 batteries and all switches were OFF!
In less than a week my voltage dropped to 2.2v!!!

How is that possible?!

cant see how thats possible
you had ps disconnected and pc disconnected?
and all thats left is 4 cells connected in parallel?

Exactly.
I noticed same thing when I insulate my DC cables, in maybe two days voltage droped to 2.8v, but I thought that I probably forgot to turn off some of the switches.
I recharged them last night using a smaller PS and 3.3v Reg. and will see.

is it posibile that batteries are dying?

[tony]

Is there not a possibility of them draining through the grounds unless they are isolated also? Maybe you have done that Adam already.
I am calculating 4 switches with 4 or 5 inputs per switch to try and ensure batteries are isolated. It just needs a circuit somewhere in the mix I think to allow draining

[nige2000]

Is there not a possibility of them draining through the grounds unless they are isolated also? Maybe you have done that Adam already.
I am calculating 4 switches with 4 or 5 inputs per switch to try and ensure batteries are isolated. It just needs a circuit somewhere in the mix I think to allow draining

Nope that's an issue with multiple voltage rails and batteries been switched on ground as the circuit is not completely broken when off
Switching on all positive voltage rails solves the issue
We used to switch on ground to save on amount of switches needed until we seen this discharge issue

[tony]

Nope that's an issue with multiple voltage rails and batteries been switched on ground as the circuit is not completely broken when off
Switching on all positive voltage rails solves the issue
We used to switch on ground to save on amount of switches needed until we seen this discharge issue

Watcha talking about Willis? We the royal we?? Are you saying grounding all batteries to one single point is ok or if you keep them separated there is no problem leaving them live so too speak. If it is only the lives it would certainly cut down on switches required

[sima66]

My Teradak turn ON automatically when I turn my PC ON.

After I turn my PC OFF, I can hear that the little hum from Teradak stops, but the light from the 3.3v reg, what's charging my batteries, remains ON.
Is is possible that Teradak is still working "slowly", or is completely OFF and actually DRAIN my batteries?!

[sima66]

My Teradak turn ON automatically when I turn my PC ON.

After I turn my PC OFF, I can hear that the little hum from Teradak stops, but the light from the 3.3v reg, what's charging my batteries, remains ON.
Is is possible that Teradak is still working "slowly", or is completely OFF and actually DRAIN my batteries?!

Any thoughts??