General > General Technical Chat

Rechargable vs. Non-Rechargable Batteries - AA/AAA Size

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EEVblog:
I use the black Eneloop Pro's and they are great. But because they are so expensive I don't use them in long life stuff like remote controls.
I just throw alkalines in those and hope they don't leak. But I've found that only the stuff that is left and forgotten that leak, not stuff used daily like remotes.
For a charger I use a Nitecore UM4

EEVblog:

--- Quote from: Halcyon on July 22, 2021, 04:10:58 am ---So I ended up buying some Energiser "Ultimate Lithium" AA's for my keyboard and mouse.

They work great in the mouse but the keyboard refuses to power on. Measuring the voltage, the new lithium batteries measure 1.8 volts each, which seems quite high. I'm guessing the keyboard is expecting a maximum of around 3 volts, not 3.6?

--- End quote ---

Yep, not that uncommon. Usually a lowish load for a few minutes will take the edge off the fresh peak voltage.

retiredcaps:

--- Quote from: EEVblog on July 22, 2021, 10:58:12 am ---I use the black Eneloop Pro's and they are great. But because they are so expensive I don't use them in long life stuff like remote controls.

--- End quote ---
If black Eneloop Pro is 2550 mAh and you are willing to accept a small drop in capacity, Ikea Ladda 2450 mAh AA are listed for $10 Aussie dollars for pack of 4 as per

https://www.ikea.com/au/en/p/ladda-rechargeable-battery-hr06-aa-1-2v-50504692/

Just make sure they say "Made in Japan" on the packaging as some of the pictures earlier in this thread has shown.

Miti:

--- Quote from: retiredcaps on July 22, 2021, 07:17:15 pm ---Just make sure they say "Made in Japan" on the packaging as some of the pictures earlier in this thread has shown.

--- End quote ---

That's what I bought and they are made in Japan.

Halcyon:

--- Quote from: EEVblog on July 22, 2021, 11:05:05 am ---
--- Quote from: Halcyon on July 22, 2021, 04:10:58 am ---So I ended up buying some Energiser "Ultimate Lithium" AA's for my keyboard and mouse.

They work great in the mouse but the keyboard refuses to power on. Measuring the voltage, the new lithium batteries measure 1.8 volts each, which seems quite high. I'm guessing the keyboard is expecting a maximum of around 3 volts, not 3.6?

--- End quote ---

Yep, not that uncommon. Usually a lowish load for a few minutes will take the edge off the fresh peak voltage.

--- End quote ---

I put the batteries that I installed in my mouse into my keyboard (they were measuring about 1.7v each) and they work fine.

Looks like the over-voltage cut-off for Lenovo wireless keyboards is just over 3.4 volts.

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