Electronics > Repair
Tektronix TDS3BAT rebuild
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JimLev:
Thanks for posting this, just found it. I’ve got a TDS3054B, I’ll have to pull the battery out tomorrow to see if’s one that is recalled.
Getting a brand new battery for free would be nice.
JimLev:
I pulled the battery module out and opened it up today. Didn’t pull the individual cells out, couldn’t see any writing on them.
The cells were the size of the 18650 cells so I’m hoping they are the lithium ones.
The modules had TDS3BATC on it so I’m pretty confident they aren’t NiCads.
Dave Wise:
TDS3BATC is current production.  TDS3BAT was nickel-cadmium, TDS3BATB and TDS3BATC are lithium 18650.  TDS3BATC has a new design for the slow charger and an extra layer of protection, added when a TDS3BATB burned at a customer site.  It still doesn't have a cell balancer.  More info at the thread whose URL I posted earlier.
cunningfellow:
Anyone looking to replace the NiCad D cells in a TDS3BAT should take a trip to IKEA.

The Ladda 2450mA cells (OEM Panasonic Eneloop Pro) work out at $60AUD for 20 cells (5 packs * $12).

Weld them up in a 10S2P and they fit in the bulge part of the TDS3BAT no problem.

You end up with 4.9AH of juice.  Which is inside the 4..6AH range the coulomb counter chip thingy expects and a whole lot cheaper than any D cells I could find to buy.

I 3D printed the holder from a file I downloaded from Thingverse
bingo600:

--- Quote from: cunningfellow on June 25, 2024, 07:38:52 am ---Anyone looking to replace the NiCad D cells in a TDS3BAT should take a trip to IKEA.

The Ladda 2450mA cells (OEM Panasonic Eneloop Pro) work out at $60AUD for 20 cells (5 packs * $12).

Weld them up in a 10S2P and they fit in the bulge part of the TDS3BAT no problem.

You end up with 4.9AH of juice.  Which is inside the 4..6AH range the coulomb counter chip thingy expects and a whole lot cheaper than any D cells I could find to buy.

I 3D printed the holder from a file I downloaded from Thingverse

--- End quote ---

Neat solution  :-+

But isn't there a charger issue ?
I'm not an EE, but think i read that  NiMH was not happy with a NiCD charger.
Was it the "trickle charging" that was too high or ....

Just a "concern" ...

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