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  • 2 Post By Jim in Idaho

Thread: 1.5v (vs1.2v) rechargeable batteries

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  1. #1

    Dec 2012
    Dues, AT Pro, Tesoro Sand Shark, Excal II
    165
    98 times
    Metal Detecting

    1.5v (vs1.2v) rechargeable batteries

    I see them on Ebay and other sites. Has anybody tried them?

  2. #2
    us
    Nov 2013
    Philadelphia PA
    DFX 950, U13,6"Exc & 4x6 Coils, Coinmaster GT 4x6 & NEL Hunter coil, TRX Pin Pointer, CZE-T200 FM Transmitter, Sangean DT-400W and ER6i in-ears.
    973
    554 times
    All Types Of Treasure Hunting
    A good set of rechargeable batteries are 1.4V when charged.. Lacross BC7000 and a set of PowerEX 2700s has been working well. Having a good smart charger that will allow you to run a refresh on the batteries and verify each cell can provide the rated output is very important.. one bad apple spoils the bunch. Also lets you run a break-in on the new cells so when you use them they last to the fullest capacity.
    Do some research..

  3. #3
    Charter Member
    us
    Jul 2012
    Blackfoot, Idaho
    White's GMT, DFX, Coinmaster, TDI-SL, old Garrett Masterhunter BFO 'Way Too Cool' dual 18 Watt UV light
    2,471
    2823 times
    Prospecting
    NiMH batteries are 1.2 volts/cell. You can charge then higher, but it's only a "surface" charge, and quickly drops to the 1.2 volts under load. If you don't believe me, put the freshly charged batteries in the unit, and run it for 10 minutes, and then recheck the battery voltage. NiCAD's are also 1.2 volts/cell. Lithium ion rechargeables are Nominally 3.6 volts/cell. They can be charged higher to about 4.2 volts/cell, but it causes reduced battery life.
    Jim
    Last edited by Jim in Idaho; May 03, 2015 at 09:47 AM.
    Pennypacker and Uncle Jeff like this.

  4. #4
    us
    Bill Jones

    May 2007
    Lewiston, Idaho
    Multiple Tesoros and Whites
    1,767
    687 times
    Metal Detecting
    Always been curious as to why the Nicads and Nimhs are only 1.2 volts. Can't they be designed with more capacity?
    luvsdux

  5. #5
    us
    Nov 2013
    Philadelphia PA
    DFX 950, U13,6"Exc & 4x6 Coils, Coinmaster GT 4x6 & NEL Hunter coil, TRX Pin Pointer, CZE-T200 FM Transmitter, Sangean DT-400W and ER6i in-ears.
    973
    554 times
    All Types Of Treasure Hunting
    This explains the 1.5v NiZn rechargeable pros/cons as well as lots of other things..
    http://michaelbluejay.com/batteries/rechargeable.html
    MD need about 8.5 -9 volts so 1.2 is plenty as long as they they have a high storage capacity 2500-2700Mah

  6. #6
    Charter Member
    us
    Jul 2012
    Blackfoot, Idaho
    White's GMT, DFX, Coinmaster, TDI-SL, old Garrett Masterhunter BFO 'Way Too Cool' dual 18 Watt UV light
    2,471
    2823 times
    Prospecting
    Quote Originally Posted by airscapes View Post
    This explains the 1.5v NiZn rechargeable pros/cons as well as lots of other things..
    http://michaelbluejay.com/batteries/rechargeable.html
    MD need about 8.5 -9 volts so 1.2 is plenty as long as they they have a high storage capacity 2500-2700Mah
    That's true for some detectors, but not all....some work best at the highest voltage.
    Jim

  7. #7
    Charter Member
    us
    Jul 2012
    Blackfoot, Idaho
    White's GMT, DFX, Coinmaster, TDI-SL, old Garrett Masterhunter BFO 'Way Too Cool' dual 18 Watt UV light
    2,471
    2823 times
    Prospecting
    Quote Originally Posted by luvsdux View Post
    Always been curious as to why the Nicads and Nimhs are only 1.2 volts. Can't they be designed with more capacity?
    luvsdux
    It's simply a matter of the chemistry. Alkalines use a different chemistry than LI, or NiMH. It sure would be nice if they all produced the same voltage, wouldn't it?
    Jim

 

 

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