This thing is good?
edited, these black have higher voltage
Idk but some good affordable 9V batteries wouldn’t hurt to have to subbed.
If you have a charger that can charge 2-cell Li-on via a 9v clip or alligator clips I strongly recommend you to get 9v Li-on cells. The difference is amazing. 9v NiMh of just about any brand is pathetic, especially if an occasionally used device.
Miller, I don’t understand well, the lower voltage dont affect the working of equipments?
I will use those in multimeters and portable weight scales and I worried if the lower voltage of commons rechargeables will affect the values in those equiments.
Flydiver, even LSD NiMh batterys dont perform well?
The great probem of the lions is the voltage full charged 8,4V I think its very low :weary:
Franz, briefing of my experiences:
- My kitchen scale never worked reliably with a 6HR61 (Ni-MH), only for a little while fresh off the charger because of peak voltage (it is now running on a vintage linear 9V “brick”, which provides it with far in excess of 11V
). - Just yesterday I replaced the 6F22 inside of my multimeter, which had been showing the low battery indicator for a good while. I measured its voltage after taking it out: 8'94V. :FACEPALM:
Of course this equipment may have been particularly picky but… you get the idea. :-)
Now if they were to make a “9V” out of a 3S LiFePO4 cellpack, that would work. :THUMBS-UP:
Cheers ^:)
Barkuti, the battery of the link Ni-9.6V-260 have the same especs that “brick”, when charged it reachs 11~11.5V. Do you know if this solve the problem?
The voltage of that is rated 9.6V and the commons 8.4~8.6V :partying_face:
I really want to reduce the amount of trash, the alcalines is pure crap, I buy a good amount wich near dead after first use :confounded:
I have no experience with LSD NiMh 9v so cannot comment. I do believe that since it is made up of a bunch of tiny cells that it may not be all that effective, but I don’t know that.
The 9v NiMh cells I have worked with worked when freshly charged but lost charge quickly.
The 9v Li-On so far have worked in any 9v application I’ve put them in. Possibly this is because they sustain the voltage well, maybe better than NiMh and alkaline which possibly drop a lot. I just know that they work a whole lot better. I only found this out because the Aquarium I volunteer at replaces and recycles them periodically. I brought some home to try out and was amazed how well they work and these are 2-3 years old and well used. 9v NiMh by then are complete garbage.
Can a decent set or brand be linked or named to?
I see sets with 2 li ion cells and charger from around $14 on AliExpress but fearing to order rubbish because why would they only make cr@p 18650/26650 cells but good lower priced 9V batteries right?
Very interesting thread as I am in the process of exchanging several “9V” 6F22 NiMh batteries that I use in my multimeters, thermo sensors, wall scanner, fire alarms etc.
I found that one cannot trust specifications like “true 9V output”. It is best to buy some models and test for yourself.
I have bought 2 types:
https://www.fasttech.com/products/1812000
This has 2 cells Li-Ion in series. The voltage is 7.2V and 8.4V when fully charged. There has to be a balancing circuit inside or else it will fail early (the charger for these has been called crap). My multimeters give up between 6.5V and 7.5V so this type of battery is not good for all of them. I think I read that the output end voltage was protected at 5.5V.
http://www.banggood.com/ZNTER-S19-9V-400mAh-USB-Rechargeable-9V-Lipo-Battery-p-1070703.html
This has 2 cells of Li-polymer in parallel and a booster circuit that deliver a very steady voltage in the range 9.3V to 9.5V (measured 5 pieces). It took 930mAh to charge one of the batteries with the build-in USB charge circuit. I intent to see how much it takes to refill after a certain time of no-use (booster keeps working?). This battery type can also be had in 1.5V versions, like Kentli (that HKJ tested positively), but with the smarter USB charging. The cells is said to have all nesessary protections and are “promised” to 3000 cycles. That has yet to be seen.
I have asked M4DM4X for a deal on ZNTER but had no answer yet.
Those look good, I’ll send martin a PM to second your request!
yes pointed Martin to your post.
How would they stack up against these?
The only ones I have used are iPowerUS.
I have not had to buy any so am not sure where you can get them but the link above shows dealership locations and has contact info.
I charge them with a hobby charger (Accucell-6). These are well used and most are 2-3 years old and still test out at 500mA+, below that I throw them away. They are 8.4v when full and hold that charge a long time. My multi-meter lasts months with them. With NiMh it lasted a few weeks. I even have them in a smoke alarm above my charging station and they go for more than 6 months there. (I don’t recommend them for that application, this is just a test).
I saw that one and I would say I’m a bit sceptical!
They point out that the voltage after charge is 8.3V. I think it is just 2 LiIon in series. And not 800 mAh. Else they have invented a small “Tardis” with double space inside, but the same weight (almost). Buy it, but be sceptical, my advice is. :confounded:
BTW thanks for noticing Martin. BG had Znter for 6.99 early this month.
gauss163, my data can be useful. Those “no-load” 8'94V clearly indicate my multimeter doesn't tolerate much of a voltage drop. I don't really know what kind of internal resistance does a 6F22 has, but it sure won't be much different than the close to 2Ω figure for a 6LR61 (1'7Ω for a Duracell alkaline I heard); for a 0'2A multimeter load, which is very unlikely, the voltage drop would still be under 0'4V.
Sorry, can't measure the load voltage of my multimeter's battery with my multimeter (well, maybe I could try, but I don't want to summon the Magical Smoke Spirit ).
Those ZNTERs seem to be a nice deal because of the DC-DC boost regulated output.
Still, I can buy an alkaline 6LR61 locally for €1'50 so… ccl.
Cheers ^:)
CCL? now that is not very nice 
I think batteries and cells that can be recharged are always to be preferred.
I have a few smoke detectors with the batteries removed since they started beeping.
With a battery one can charge they would still be functional now
BTW a pair is just $15
Hope Martin can bring it down, winter is coming so the woodburners are to be fired up. need a couple to power the smoke and CO detectors before that time.
And Martin is looking into a better price.
I think I want all devices using these kind of cells with rechargeables
4 smoke detectors, 2 CO detectors, 4 in 1 metal detector, 1 laser distance meter, 1 thermometer, 1 DMM, 1 lux meter, 1 wall wire/pipe finder of the top of my head
Dang 15, hmm I start with 4 and deplete them in the metal detector for testing first
That znter seems good, how it performs about a year with low usage?
I came to update with one input about that znter….
So, I bought 2 of then in banggod and it came in october. I tested in my “Weighing machine” (I cannot know the name of that thing in engish) and it has a self discharge very high in eletronics devices which do not open the circuit because the boost driver works in series and have a high parasitic drain….
In devices which have a great consumption, this works well, the boost driver mantain in 9,5V full loaded.
So, I charged in october those batteries and one lose your charge in 2 or 3 weeks and yesterday I try the other and it had a full charge yet (I not charged before the first in october). This means it not have a self discharge in open circuit.
the name your looking for is “scale”.
for rechargeable 9v I bought the soshine 2x 650mAh and a charger, so far so good.
what are your thoughts about the 1200mAh
Li-SOCl2 chemistry?
seems to be an advanced chemistry when I looked it up.
Do you have a link for those?
Pardon my ignorance, but do any of these have under voltage protection?
TIA