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rechargeable 9 volt batteries #4620198
01/01/18 12:47 AM
01/01/18 12:47 AM
Joined: Dec 2012
Posts: 685
Washington for now
WhyMe Offline OP
WhyMe  Offline OP

Joined: Dec 2012
Posts: 685
Washington for now
i have way too many things that still require a 9 volt battery. they are not cheap either. i was thinking of getting some rechargable ones . i read they are not true 9 volt but 8.4 or 7.2 . also they don't last long

anyone have 9 volt rechargable and share your experience with them?

Re: rechargeable 9 volt batteries [Re: WhyMe] #4620202
01/01/18 12:59 AM
01/01/18 12:59 AM
Joined: Apr 2015
Posts: 467
Reunion Island
Superflan Offline
Superflan  Offline

Joined: Apr 2015
Posts: 467
Reunion Island
I have some that are 8.4V spec.

I use them only for motor or lighting application. For the rest, the less voltage and the auto discharge rate is not advantageous. Alkaline are the way.

Same with 1.2V rechargeable (1.5V conventional) : they donít work well in some electronic appliances. I used them only for lighting, motor, digital cameras (they seems built for this). I even use Alkaline in my toys drones romote controllers


Peugeot Partner 1.9 D, 5W40 C3, 245000 Km, running on WVO
Wife's Mitsubishi Outlander PHEV, dealerís overfilled, 16000 Km
Re: rechargeable 9 volt batteries [Re: WhyMe] #4620205
01/01/18 01:10 AM
01/01/18 01:10 AM
Joined: Apr 2012
Posts: 6,261
MA
Wolf359 Online content
Wolf359  Online Content

Joined: Apr 2012
Posts: 6,261
MA
What things are you using that require 9v? I prefer regular lithium batteries for things like smoke detectors. They can last 10 years. I used to pick them up on eBay for around $4-$6 each. Or I just grab a bunch of regular 9v alkaline on eBay, usually when you get a dozen or more at a time, they're usually in the $1+ range each, at least it's cheaper than the store.

Re: rechargeable 9 volt batteries [Re: Wolf359] #4620211
01/01/18 01:33 AM
01/01/18 01:33 AM
Joined: Dec 2012
Posts: 685
Washington for now
WhyMe Offline OP
WhyMe  Offline OP

Joined: Dec 2012
Posts: 685
Washington for now
Originally Posted By: Wolf359
What things are you using that require 9v? I prefer regular lithium batteries for things like smoke detectors. They can last 10 years. I used to pick them up on eBay for around $4-$6 each. Or I just grab a bunch of regular 9v alkaline on eBay, usually when you get a dozen or more at a time, they're usually in the $1+ range each, at least it's cheaper than the store.


Shot timer, chrono, ear protection . i am just tires of buying batts for them . the ear muffs eat batteries

Re: rechargeable 9 volt batteries [Re: WhyMe] #4620215
01/01/18 01:44 AM
01/01/18 01:44 AM
Joined: Aug 2010
Posts: 12,915
Northern Kentucky
901Memphis Offline
901Memphis  Offline

Joined: Aug 2010
Posts: 12,915
Northern Kentucky
The alkalines are affordable in bulk.

AmazonBasics 9 Volt Everyday Alkaline Batteries (8-Pack) https://www.amazon.com/dp/B00MH4QM1S


https://www.batteryjunction.com/mn-1604.html


2012 Chevy Cruze LT 1.4T - 59k - Edge 0w30 SL + Mahle OX401D
2002 Buick Century 144k - Built 4T65e(Maxlife) - GTX 5w30 + Fram XG3980
Re: rechargeable 9 volt batteries [Re: WhyMe] #4620229
01/01/18 02:03 AM
01/01/18 02:03 AM
Joined: Dec 2016
Posts: 7,991
Waco, TX
Linctex Offline
Linctex  Offline

Joined: Dec 2016
Posts: 7,991
Waco, TX
Originally Posted By: WhyMe
i am just tires of buying batts for them . the ear muffs eat batteries


My shooting muffs don't use any batteries! grin crackmeup cheers


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: rechargeable 9 volt batteries [Re: WhyMe] #4620274
01/01/18 05:30 AM
01/01/18 05:30 AM
Joined: Dec 2002
Posts: 42,512
'Stralia
Shannow Offline
Shannow  Offline

Joined: Dec 2002
Posts: 42,512
'Stralia
Mine don't either...not much interested in conversations while pulling the trigger.

I've got a REZAP charger that will charge regular Alkalines, including 9V...the 6V and 9V are a "pile" in that they are a number of cells in series, so the smarts in the charger don't work as well when charging them..get a few rounds out of them (unless they are Duracel...duracel batteries pop when recharged, just about any other gets me 4-5 goes at it before they simply fail...then leak in the recycling bottle)

Re: rechargeable 9 volt batteries [Re: WhyMe] #4620290
01/01/18 07:16 AM
01/01/18 07:16 AM
Joined: Jul 2012
Posts: 690
Perth, Western Australia
Brad_C Offline
Brad_C  Offline

Joined: Jul 2012
Posts: 690
Perth, Western Australia
There are some nice 9.6v nimh lsd batteries, but I've recently changed to 2cell lithium ion. Much lower voltage off the bat, but holds up with a flatter discharge curve than alkaline so in the end the results are pretty good. Nearly 3 times the capacity of the nimh and about the same as a reasonable alkaline. I'm impressed, and I'm a pretty hard marker on batteries.

It's a bit of a search to find quality units with verifiable data sheets and local support though.

Re: rechargeable 9 volt batteries [Re: WhyMe] #4620307
01/01/18 08:12 AM
01/01/18 08:12 AM
Joined: Oct 2002
Posts: 37,034
Great Lakes
Quattro Pete Offline
Quattro Pete  Offline

Joined: Oct 2002
Posts: 37,034
Great Lakes
Rechargeable 9V cells aren't cheap... http://a.co/jeOlD7D

And then you have to buy a charger.


'02 530i (Edge 0W-40)
'15 Q5 3.0T (Edge 5W-40)
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Re: rechargeable 9 volt batteries [Re: WhyMe] #4620327
01/01/18 08:51 AM
01/01/18 08:51 AM
Joined: Apr 2013
Posts: 203
Kevil,Ky
vwmaniaman Offline
vwmaniaman  Offline

Joined: Apr 2013
Posts: 203
Kevil,Ky
Have you tried DX.com. Good stuf and bad stuff. Just don't be in a big hurry. They come from China usually. Be sure to read reviews


Don't waste your time on a slipshod repair.
Re: rechargeable 9 volt batteries [Re: WhyMe] #4620345
01/01/18 09:22 AM
01/01/18 09:22 AM
Joined: Jun 2003
Posts: 34,068
ME
eljefino Online content
eljefino  Online Content

Joined: Jun 2003
Posts: 34,068
ME
I get my 9Vs from Dollar Tree. Run them in smoke detectors for a year (they lose 0.2 volts doing that) and then throw them in the junk drawer for reuse in voltmeters etc.

Re: rechargeable 9 volt batteries [Re: vwmaniaman] #4621080
01/01/18 08:38 PM
01/01/18 08:38 PM
Joined: Apr 2012
Posts: 6,261
MA
Wolf359 Online content
Wolf359  Online Content

Joined: Apr 2012
Posts: 6,261
MA
Originally Posted By: vwmaniaman
Have you tried DX.com. Good stuff and bad stuff. Just don't be in a big hurry. They come from China usually. Be sure to read reviews


I stopped buying from them a long time ago. Their batteries are usually fake. I just got a charger that will run down the battery and charge it up to tell you the mah rating of the battery. I've gotten some real 18650 batteries from Amazon that meet their 2300mah ratings and I found a few old ones that claimed 2000-3000 but they didn't even crack 1000 on my charger.

Re: rechargeable 9 volt batteries [Re: WhyMe] #4621232
01/01/18 11:05 PM
01/01/18 11:05 PM
Joined: Aug 2006
Posts: 9,989
Central Washington
Colt45ws Offline
Colt45ws  Offline

Joined: Aug 2006
Posts: 9,989
Central Washington
I pretty much just buy lithium 9v for smoke detectors and my Fluke. My Fluke eats Alkaline 9Vs so fast I can hardly change them out fast enough. The Lithium one I put in it is still going strong.


-Colton
2002 Ford Crown Vic PI 207k, Ex-Kootenai County, ID Unit #42
Down for engine swap
2003 Ford Crown Vic PI 86k
Pennzoil Conv HM 5W30, Fram XG2
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