A whole new approach to bag batteries

[RadoStefanov]

I think we are overdue for a new battery system and integration. I am working on something cool. Bag only. 
carts are easy. 

[OB1]

Custom 18650 cell packs are easy to build if you have that level of skill and tools. I've done it for countless other reasons outside of this line of work and was thinking of something for my mobile cart/bag rig. Looking forward to seeing what you come up with.

[Derek H]

Rado, will you be revealing this along with your new sound cart concept?

[RadoStefanov]

My concept is done and build. Just have not had the time to put panels on the drawers.

 

After the 2nd of October I have a few days off and will finish it. 

 

 

[LDstudios]

Eh? Eh? Eh?

 

I can’t remember the name of the specific battery (Duracell HT60?), but this was my garage mad-scientist wizardry (stupidity?) to get an old EMI tube ENG reel to reel machine up and running. Must have been from the late 50s or 60s. It certainly pre-dated the Nagra. 

It used a pair of 67.5v batteries to get the plate voltage up to ~130volts. 

[locaudio]

I am not a Sonosax user, but I think the design of their recorder in terms of power is great.

A built in slot for a smart battery, a hirose input, and a hirose output, so the unit itself acts as your BDS with backup/hot swap capabilities.

I guess it's the same as using an SL-2 with a SD.

 

Looking forward to seeing what you are cooking up Rado!

[Patrick Tresch]

I think the point of view of Sonosax is also that externalizing the power managment to 3rd party/user could be a hickup for the sound quality. Therefore they  prefer to have it within the machine to manage this part. 

[RadoStefanov]

On 9/25/2025 at 12:55 PM, Patrick Tresch said:

I think the point of view of Sonosax is also that externalizing the power managment to 3rd party/user could be a hickup for the sound quality. Therefore they  prefer to have it within the machine to manage this part. 

It’s just a powered  cable. Nothing to do with sound quality. How the SONOSAX handles the energy is what it’s important. Internal or external.

 

I do Love internal batteries and designed my OneUnit with one.