Products > Test Equipment

Fluke 287/289 Lithium Mod - No More Batteries in the Trash!

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scopeman:
Now I finally have a use for the old battery cover where all of the contacts were destroyed by alkaline batteries!

Sam

coppercone2:

--- Quote from: Ingineer on November 19, 2023, 12:35:03 am ---The only thing the HRC fuses protect are the current ratings.  To create plasma in a meter you'd need to send thousands of volts in there, and if you do, you probably have bigger problems at that point.

If you work around > 600V this isn't the right tool for the job anyway.

--- End quote ---

I have seen regular fuses explode and metalize everything nearby (it probes short circuit )... I have also seen fire shoot out of a meter on video. but the 289 is cat IV to 600V.
I would love to hear about fluke from this..

DaneLaw:
It looks good, nice mod :-+ with a perfect-sized 7.4v 5000mah pack-

Ingineer:
Sam has another good point.  I've had a lot of stuff destroyed by leaking alkalines, and it seems like the problem is only getting worse.  I wouldn't have that happen on something I use often because I usually notice the low batteries fast, but I've had some older stuff I forgot about succumb to the leaks.   This mod nips that problem in the bud!

robert.rozee:
it looks like, with minimal effort, Fluke could release an alternative back that holds 2x 18650 Li-Ion cells in a north-south orientation, with spring-loaded contacts onto the cells so these are removable and can be externally charged. the diameter is an AA cell is around 14mm, while an 18650 is 18mm, so they only need to find an extra 4mm; the tilt stand design may also require reworking to accommodate this.

this is what i am looking at doing with a number of battery operated items around the home. good external chargers, like the NiteCore D4, are readily available and modern 18650 Li-Ion cells can hold a significant portion of their charge for longer than the lifespan of an AA Alkaline cell. it also seems that the world is filling up with spare (unprotected) 18650 cells that have good lifespan, left over from discarded laptop and electric scooter batteries.


cheers,
rob   :-)

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