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Your external pack looks promising; thanks for posting. If you can share more specific information about the cell used, the pcb (schematic and parts list), and the connections, others looking for a similar solution might choose to build one.
Was that PCB repurposed from another application? A protection and charging circuit? And, have you given any thought on how you'll case it up?
I'm still thinking the ultimate solution would be an internal (max-voltage-possible) cell with a charging/protection circuit that can be used on the go, or, plugged in while stationary; charging the battery or trickle-charging while the external source is used to drive the amp.
I'm sure Justin would love to help between building BHSEs (batch 3&4) and many other fine products and shipping Stax gear the same day purchased. Hopefully someone knows a guy that knows a guy that can also assist.
Your posts and impressions on the SRS-002 helped me pull the trigger; mine should arrive today. Thanks a bunch for sharing with the community.
Hi drp
i am sorry , I bought from my friend DIY , I know only That he use Samsung Galaxy S3 battery . I don't know about the pcb board for the charger .
that's why for head fier friends who live in USA or other country , maybe Justin from Headamp know about this external battery .
its very good if Justine can sell so kind of external battery for us .
this battery can improve SQ significant , more power , better bass impact , better clarity
better separation and soundstage .
i have 3 benefits from this external battery :
1. I can safe money to buy 1,5 volt battery
2. I worry about the battery cover from my Srm 002 , that's one day can broken , because
Open and close ( the material from plastic )
3. I can improve my SQ from Srm 002