Products > Test Equipment

Rechargeable 9V batterries for DMM or Alkaline only?

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bdunham7:
I highly recommend:

https://www.amazon.com/EBL-Rechargeable-Batteries-Battery-Lithium-ion/dp/B08HRXHKQV

AVGresponding:

--- Quote from: JenniferG on November 24, 2022, 09:30:34 am ---
--- Quote from: tszaboo on November 24, 2022, 08:43:09 am ---I use USB rechargeable battery, that has a DC-DC converter inside. Works great. Why? Because I don't have a nice 9V charger or battery, they don't make LSD 9V. Or they don't advertise it well.

--- End quote ---

Do you have a link to the one you bought? I'll probably buy that one.   Sounds good.

--- End quote ---

Aliexpress
HobbyKing

Personally I'd trust HobbyKing more than Aliexpress. YMMV. HobbyKing is also where I buy my AA and AAA LSD Ni-MH, and AA Ni-Zn.

james_s:

--- Quote from: tszaboo on November 24, 2022, 08:43:09 am ---they don't make LSD 9V. Or they don't advertise it well.

--- End quote ---

Sure they do, I have a pile of them, maybe they don't advertise it well, but typically the package will say something like "pre-charged" or "ready to use". Most NiMH batteries currently made are LSD, it isn't a special thing you have to search for anymore.

BillyO:
I've used a 6 cell D-cell battery holder for cheap isolated powering of 9V equipment for long periods.  You can get them on eBay or Amazon for about $5.

There are 4 advantages to doing this.

1) Alkaline D-cells are relatively cheap.
2) They can be used for lot's of other household things, like flashlights, toys, etc.  So won't go to waste before they are depleted.
3) Being external, if they leak they will not destroy your meter.
4) They pack a lot of energy.  They will likely power a UT61E for many, many months.

Kleinstein:
D-cells are very much running out of favor in many cases.  If not careful you may end up with an AA size cell with extra spacer to make it fit the old form factor. An alkaline AA tends to last not as long as a class D dry cell though. Not many new toys / tools use the D-size - it is more like going obsolete: low power devices usually don't need that much capacity and higher power devices tend to use rechargibles.

Even with just an external battery, this makes it tricky to keep the isolation barrier with an extra cable / connector. 

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