Hello guys,
As shown above, my cousin recently gave me these packs. Pressing the white button for ‘battery voltage’ doesn’t do anything, not even when charged.
Have anyone here ever successfully replaced the batteries inside? (assuming they are 18650 or 18350s)
They are spare batt packs for the Respironics EverGo portable oxygen concentrator.
That may be some 4S3P 18650 packs with dead ≈2.2Ah cells inside. If required, buying some newer cells with at least the same current rating as the ones inside would work. Cell soldering/spot welding required in such a case, imho.
:-)
In the coming days I will be breaking one apart, I am just concerned that since it’s glued and most probably break the case when I open it, I might damage the connectors that connect to the charging dock of the Oxygen Concentrator.
I have broken apart several laptop packs before (with no intention of replacing the batts but to salvage) and as far as I can remember, it’s quite difficult to break the glued case open without somehow destroying it.
A tutorial on how to open the pack without destroying it is I believe the best approach, and I don’t know how to do it!
Help!
Yep if you want to use it again you will need to heat the glue up or else the case will crack. Try a bit of heat pointed towards the outside so it doesn’t heat up the cells. Also to much heat will be bad for the plastic so dont go to hot maybe 80-100 degrees Celsius?. You can always test how much heat the pack can handle with a soldering iron in a small spot.
I have read this heating suggestion before by using a hair dryer, but I think it was only a conjecture on the writer. Does anyone actually tried using a hair dryer, and does the type of glue used in the packs actually melt so as to easily separate the upper and lower enclosures?
I have been using a hot glue gun heaps lately and it melts at a fairly low temp maybe 60-100 degrees Celsius depending on the glue so a hair dryer should work fine. I cant comment if it will work or what glue is being used on this product but its worth a try i think.
Most likely they would use hot glue or else it would take a while to dry.
Yes, this short of “not designed to be reopened” stuff is something I love so much. :P
Having dealt with a few laptop packs, some have inner tabs which can be forced open with the help of mobile device plastic opening/prying tools for sale at the usual chinese vendor places. A few others may come definitively sealed, in such case a Dremel type rotary tool with cutting discs will help do the job neatly enough to finish closing the box again with a polished layer of hot glue or epoxy.
Cheers :-)