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Offline Eugene52Topic starter
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« on: June 20, 2021, 04:01:05 pm »
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Hello Everyone.
On my newest Metal Detector a 9 volt alkaline battery should last 20 hours. Little over 2 full days of operation. Does lithium ion last 5 times longer on the rechageables Huh? I'm ready to buy 5 lithium batteries and a charger for $27.99. Just want to hear from someone how long the 9 volt rechargeable lithium
 Will last. It may depend on milliamp-hour rating.
Thanks everyone.
Eugene

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Offline nickel_n
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« Reply #1 on: June 23, 2021, 07:43:19 pm »
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look at the link

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the typical capacity of a disposable alcaline is 550mAh and a disposable lithium 1200 at 9V nominal voltage
the rechargeable lithiun-ion is 620mAh at 7.4v


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« Last Edit: June 23, 2021, 07:46:41 pm by nickel_n » 		Logged
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Offline Eugene52Topic starter
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« Reply #2 on: June 23, 2021, 09:02:34 pm »
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Quote:Posted by nickel_n
look at the link

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the typical capacity of a disposable alcaline is 550mAh and a disposable lithium 1200 at 9V nominal voltage
the rechargeable lithiun-ion is 620mAh at 7.4v


Thank you nickel_n .
I will check it out. I'm hoping a lithium rechargeable would provide 40 hours of Metal Detecting which would be fantastic !!! Thank you again.
Eugene

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Offline Eugene52Topic starter
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« Reply #3 on: June 26, 2021, 08:41:50 pm »
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Hello Everyone.
So far, 850 mah is the max current I can find available on the rechargeable lithium 9 volts. They make a 1200 mah , but it's not rechargeable. If anyone finds something better please let me know.
Eugene


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Offline nickel_n
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« Reply #4 on: June 27, 2021, 02:19:14 am »
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here is a link for a  1000mAh.

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https://www.ebay.com.au/itm/274784464045?chn=ps&norover=1&mkevt=1&mkrid=705-139619-5960-0&mkcid=2&itemid=274784464045&targetid=1281061180485&device=c&mktype=pla&googleloc=1000567&poi=&campaignid=10101784997&mkgroupid=117859315410&rlsatarget=pla-1281061180485&abcId=9300367&merchantid=7604812&gclid=EAIaIQobChMI_-Sg5a-38QIVDiQrCh2skAUHEAQYASABEgJ5NPD_BwE


and 1200mAh

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https://www.ebay.com.au/itm/184588290405?_trkparms=aid%3D1110006%26algo%3DHOMESPLICE.SIM%26ao%3D1%26asc%3D232959%26meid%3Dbb09c5efa8014b8288ef10ec5056d42c%26pid%3D101195%26rk%3D6%26rkt%3D12%26sd%3D133616245483%26itm%3D184588290405%26pmt%3D1%26noa%3D0%26pg%3D2047675%26algv%3DSimplAMLv9PairwiseUnbiasedWeb&_trksid=p2047675.c101195.m1851&amdata=cksum%3A184588290405bb09c5efa8014b8288ef10ec5056d42c%7Cenc%3AAQAGAAACAB0pa9vWj0npiKIrZhq3b8M4b5iFL7LQ5MfVdMJg5qio4Ds7RAWuEIMonfuKyskyCC4D369KRz43kv71MbGcdpTvpp5ZWOTba7Cp%252FCxJTQkdGo1VL1E7IdGOubsc9ewV%252B%252FqlX%252Fra6IC%252Bvzcq%252FUIuRKzU36ms0hRNJGlhwEM2umODt4N1ctRoc%252BF4nt7lVIZhwitrcgxcvzJ8j4hEWOoPwI8%252FCTJtxYsLObs7UQpL16Kep1S9JuvHThRBkaJ2WC5Guj%252Fn2Zi%252BXbsopyNTQM2DW9sn0R%252FJeXCmmpNjLdkyAjbrcW9hwH1SBt2pksab4kpJFZtXvIx8LFhVsgknVkP7clKza09ppY0o%252FcXSbXOB1l9dakzA3MOQ8iwJgC4IUDKxaKwh%252Bt3CCgLctgMvMoWbIpMnXM9mEsLI50uK4KNLdQU0Uo%252FR%252FfrJbFvdv7KHuPL911By9urBk1J37omb9j4yVRaKgqeIA6LtTkoQsA3qbh0DSoT3th6xpCgtz6WpVH5JErIi0Ueh85A%252BL%252BJ9LEeACixTBGyfN2dDKdE5bti1Z4zrUTB9%252F6t3V7DGFfV3c6lLpccEtoTAp6t1fbov2DJk0znifBxtpJFL6q5YNbqTTCEU6n%252FJfBQVyBxYzez04apKuA8UJfXrkLBskDV2tbTQydjSHeAy5vs30077soa9AKYy%7Campid%3APL_CLK%7Cclp%3A2047675


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« Last Edit: June 27, 2021, 02:22:21 am by nickel_n » 		Logged
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« Reply #5 on: November 14, 2021, 07:21:25 am »
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For 12V device, I use gel VRLA battery 12V 1.2Ah and put 3R3 5watt before the circuit, stay 50hours one charge 1:15 minutes, quite heavy but reliable. Btw Thank you Eugene for your remarkable work here putting the projects and valuable infos. Regards

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