Es ist erschreckend einfach, #Akku|s zu finden, auf denen #NiMH #flasch geschrieben ist.

Ich vermute, dass in einigen Schreibweisen sogar ein kleines L verwendet ist 🙃

When I think about it again, #alkaline batteries, which are used once and then thrown away, are such an absurd thing. Glad I switched to rechargeable #NiMH ones years ago

My other problems with replacing an alkaline by #NiMH #battery are self-discharge rate (which might be improved in newer NiMH batteries), some of my AA batteries being too wide to fit in some devices (I should solve this by getting lower capacity NiMH), and vendors often providing alkaline batteries with their products.

Most devices that I have with AA batteries support NiMH, while theoretically some could require a higher voltage of alkalines.

Years ago charging a #NiMH #battery took almost a day and as they self-discharge quickly, I wouldn't have well-charged spares to swap when a device turns off due to insufficient charge.

Today I bought a modern charger for these, with a display showing when the battery is fully charged and needing just several hours to charge the ones I have.

Hopefully this will reduce my use of non-rechargeable AA batteries.

Zu den AA/AAA #LiIon-Zellen mit #USB:

Selten sinnvoll. Kapazität nicht höher als bei #NiMH (Ladeelektronik verbraucht Platz). Wenn man viele Zellen hat, wird das Laden zur Qual. Teurer als hochwertigste NiMH.

Spannungslage meist besser (DC-DC-Wandler).

Schlechteres Verhalten im Leistungsbetrieb.

Selbstentladung: Keine nennenswerten Unterschiede.

#Lithium zu verschwenden, wo es eine mindestens gleichwertige Alternative gibt, halte ich für idiotisch.

#Batterie #Akku

@heiseonline

Leichtgewichtige #PV-Kleinversorgung mit #NiMH-Zellen

NiMH-Zellen haben die perfekte Charakteristik, um mit minimalem Aufwand über kleine PV-Module geladen zu werden, z.B. zur Versorgung kleiner Verbraucher.

Solange der Maximalstrom des PV-Moduls kleiner ist als der Dauerladestrom (z.B. 1/10 C), ist keine weitere Elektronik erforderlich.

Vorteilhaft ist es aber, einen PTC zum Schutz in Zellnähe zu platzieren.

Umax des PV-Moduls sollte im Bereich des 1,5 - 5-Fachen der Batterie sein.

#maker

9V Adaptersatz Marke Eigenbau für alle Lebenslagen...

Laden von #NiMH-Batterien mittels Labornetzteil, Diagnostizieren von Geräten mit 9V Versorgung, 9V-Batterie für Tests als Versorgung nutzen...

Endless joy. :⁠-⁠)

Why did I stop the logging after almost 12 days? The batteries got too low - down to 0.9V/cell. That's a good place to stop discharging #NiMH AAs.

I spent nearly zero effort thinking about power efficiency, but getting about 2 weeks on a set of AAs isn't bad.

It uses a #LM317 to get a steady 3.3V, but there are better ways (with smaller dropout and lower energy waste) that I should look into. I measured 4.5mA current on the LM317's output, which I bet I could reduce. #electronics

So, #Battery question:

I am buying my mom some LED candles for #Christmas.

https://www.amazon.com/dp/B06X3VQRC7/?tag=best-flameless-candles-20&asc_source=browser&asc_refurl=https%3A%2F%2Fwww.bobvila.com%2Farticles%2Fbest-flameless-candles&ascsubtag=0000BV0000146510O1280056720221203130309%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20

And I want to buy rechargeable batteries for them. I already have this recharger: https://www.amazon.com/Panasonic-K-KJ17MCA4BA-Individual-eneloop-Rechargeable/dp/B00JHKSMJU/ref=sr_1_2_sspa?crid=1AR2N1828AMSX&keywords=eneloop+charger&qid=1670078508&sprefix=endloop+recarger%2Caps%2C63&sr=8-2-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUEzRjVRRDBIWDE3MjhEJmVuY3J5cHRlZElkPUEwOTI2ODAzMU5VNEhHWURLWlZQMCZlbmNyeXB0ZWRBZElkPUEwNzU3ODc4M0JFMFpMRTZCS0FZOSZ3aWRnZXROYW1lPXNwX2F0ZiZhY3Rpb249Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU=

Should I buy more Endloop batteries? Or will cheaper ones not explode in this?

I'm considering either these EBL: https://www.amazon.com/EBL-Rechargeable-Batteries-Performance-Pre-Charged/dp/B08P1RXCWH/ref=sr_1_29_sspa?crid=30I2RTE9DTYXW&keywords=aa+batteries&qid=1670077933&refinements=p_n_feature_browse-bin%3A23876358011%2Cp_n_feature_two_browse-bin%3A23534435011&rnid=23534200011&s=hpc&sprefix=aa+batteries%2Caps%2C65&sr=1-29-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUEyWlI5N0lTSzJBMzFVJmVuY3J5cHRlZElkPUEwODkyOTg0MkNHSlBRMExSNDlRRyZlbmNyeXB0ZWRBZElkPUEwNTUyMDcyM0JWNlI1TVBRWk0yRCZ3aWRnZXROYW1lPXNwX2J0ZiZhY3Rpb249Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU=

Or these...Tanatare: https://www.amazon.com/Tanatare-Rechargeable-Batteries-Recharegeable-Pre-charege/dp/B095HR4Y53/ref=sr_1_25?crid=30I2RTE9DTYXW&keywords=aa+batteries&qid=1670077933&refinements=p_n_feature_browse-bin%3A23876358011%2Cp_n_feature_two_browse-bin%3A23534435011&rnid=23534200011&s=hpc&sprefix=aa+batteries%2Caps%2C65&sr=1-25

Any advice?

#NiMH
#RechargeableBatteries
#Rechargeable
#Question

#introduction

I'm Tyler Morgan (she/her), a postdoc at #sfim / #nimh / #nih working on #fMRI / #layerfMRI / #7TMRI / #mrirecon methods for #neuroscience projects.

I earned my PhD in Neuroscience & Psychology from the University of Glasgow (#UofG #PsychNeuro). That work focused on predictive and contextual information in cortical feedback.