2.4volt battery inside of PSU ???

[SArepairman]

what the fuck is this shit?

http://s29.postimg.org/a8643hovp/DSC_0067.jpg
http://s28.postimg.org/bhob7w3cb/DSC_0066.jpg
http://s30.postimg.org/94svu2tfz/DSC_0065.jpg
http://s8.postimg.org/ch0ua6uk3/DSC_0068.jpg

 

battery goes here

http://s27.postimg.org/rxij2y6u9/DSC_0070.jpg

[SArepairman]

the battery is located in the AC mains power supply, but it has a long ass trace.. going into the unit... its not connected to anything else as far as I can tell...

[SArepairman]

i wonder if its possible to hook up a bench supply to substitute for this battery..

what kind of a monster would put it in the god damn power supply of all places. can't it be next to whatever its supposed to power?

[David Hess]

It is probably for some type of memory backup supply.  Maybe there was a regulatory requirement that placed the battery into the power supply.

[PlainName]

can't it be next to whatever its supposed to power?

Can't see the photos (can you bung them on the board, or use a proper hosting?) but a power supply seems a pretty decent place for supplying power to me. Many advantages over embedding a battery on the PCB - you mention one yourself when you say "i wonder if its possible to hook up a bench supply to substitute for this battery".

[Re-reads]
Sorry, that might not make much sense to you. Here's a translation:

"Can't see the stupid photos (WTF?!? Use a proper god damn host) but a fucking power supply supplies the fucking power you know. The idea isn't complete shit."

[SArepairman]

i think ~20 locktite bound screws and some difficult & tricky to remove molex connectors (brute force fitted), glued down foam (again, who uses foam to direct air flow???),  would beg to differ. You can't even put it back together without adhesive! All to change a fucking battery

Whoever put the battery there is a complete dick head. It's not like space is difficult to find in this thing.

[PlainName]

would beg to differ

I might agree if I could see that, but since I can't view the photos...

[David Hess]

i think ~20 locktite bound screws and some difficult & tricky to remove molex connectors (brute force fitted), glued down foam (again, who uses foam to direct air flow???),  would beg to differ. You can't even put it back together without adhesive! All to change a fucking battery

Whoever put the battery there is a complete dick head. It's not like space is difficult to find in this thing.

I have similar thoughts about designs that use and especially store critical calibration or option data in non-volatile SRAM which has an embedded lithium cell.  The justification I usually hear is that the battery lifetime exceeds the product design lifetime but I suspect the more important reason is that the product was intended from the beginning to self destruct after a period of time.  If that was not the case, then they would include some means for the user to backup and restore the contents.

I hear a similar justification when nVidia or Broadcom or anybody else says they cannot release design documentation because of IP agreements.  I suspect any IP agreements they made were deliberately used to create that excuse from the start.