PGM charging circuit question

[Neo-Alec]

Non-rechargeable seems to be the way to go for long-term use.

 

[Big_P Big_p]

U5
Non-rechargeable seems to be the way to go for long-term use.

I would have thought so', but if you only get a few days out of it that dosent really work.

 

[Neo-Alec]

A regular non-rechargeable CR2032 should last for years on a PGM.

 

[Big_P Big_p]

A regular non-rechargeable CR2032 should last for years on a PGM.

Yeah that's what I thought which is why I asked if this was considered typical consumption. There are a few caps (and a few other things) in the charging circuit of an MVS that can cause similar issues, but my knowledge of the PGM is a little... limited.

 

[p_ja]

Can you meter the voltage drop in the battery between when the PGM is first switched off and at 15min, 30min and 1hr. It does indeed sound like a parasitic drain and there are a few things that it could be.

Found some time to check this today, results (this is basically a brand new battery):
start: 3.20V
15min: 3.02V
30min: 2.97V
45min: 2.95V
60min: 2.93V
75min: 2.91V

Good to hear it's not supposed to be that short for PGM, this unit certainly has something wrong with it then.

Also, interesting to hear MVS can also potentially develop that problem, my MVS still has the original rechargeable button cell and it seems to work pretty well (fired it up after like 3 months if not more and it still got my scores). Certainly fares better than my PGM at the moment.

 

[Big_P Big_p]

Sorry thought i replied yesterday. I would be pretty confident to say there is a parasitic draw on the battery. There is only so many places it can be so you can probably track it down easy enough.

On another note, while tou have the shell off, would you be able to measure the distance between the original battery terminal pins and take a picture of the area for me? I'll try to get a battery blaster type replacement modelled up. My only PGM is in the Chandy at work.