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Rechargeable 9V batterries for DMM or Alkaline only?
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daisizhou:
There may be some mistakes in the schematic diagram, but the point is that it has no switch, and it is 3.6V-4.2V boosted to 9V, which can be used instead of a 9v battery
BradC:
I moved from NiMH to these about 4 years ago : https://www.batteriesdirect.com.au/shop/product/24926/lp702235-bp1.html

I use them in everything now. Meters, Shure wireless beltpack, toys...

I spent years fighting with NiMH and the Powerex LSD 9.6V were the best, but not a patch on these lithium units for lifetime and reliability. They are a "nominal 8.4V", and all my devices work and give me sufficient low battery warning to swap them before they cut off.
mwb1100:

--- Quote from: bdunham7 on November 24, 2022, 03:34:36 pm ---I highly recommend:

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

--- End quote ---

Any experience with these?:

  - https://www.amazon.com/EBL-USB-Rechargeable-Lithium-Batteries/dp/B086GTFGPP

(the 5400mWh rating on them ciphers out to the same 600mAh as you linked to).  If they work as well, I'd rather not have to make room for yet another charger - especially one that only handles 9V batteries.
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