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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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#1
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Battery polarity mistake
I have a electronic safe and the low battery light flashed so I bought 4
Duracell AAs for it. I accidentally put all 4 in the same way instead of one row in one dirction and the other opposite ( The originals had gold bands at both ends and I was working in the gloom with my varifocals at a bad angle) Within about half a minute when it appeared dead I realised my mistake. Will I have seriously shortened the life of the batteries with this mistake? If so, I will change them again. |
#2
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Battery polarity mistake
DerbyBorn wrote:
I have a electronic safe and the low battery light flashed so I bought 4 Duracell AAs for it. I accidentally put all 4 in the same way instead of one row in one dirction and the other opposite ( The originals had gold bands at both ends and I was working in the gloom with my varifocals at a bad angle) Within about half a minute when it appeared dead I realised my mistake. Will I have seriously shortened the life of the batteries with this mistake? If so, I will change them again. I doubt if you've done any harm at all. I'd *guess* that the four batteries should be in series to provide 6 volts or so. Putting all four in the same way will have produced zero volts, no current flows so no harm done. I am a *little* confused by you saying "one row in one dirction and the other opposite" though. How are the batteries arranged? Is it 'two and two' so what you have called 'one row' is a pair of cells? -- Chris Green · |
#3
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Battery polarity mistake
In article 2,
DerbyBorn writes: I have a electronic safe and the low battery light flashed so I bought 4 Duracell AAs for it. I accidentally put all 4 in the same way instead of one row in one dirction and the other opposite ( The originals had gold bands at both ends and I was working in the gloom with my varifocals at a bad angle) Within about half a minute when it appeared dead I realised my mistake. Will I have seriously shortened the life of the batteries with this mistake? If so, I will change them again. No - their voltages will have canceled out and no current flowed. -- Andrew Gabriel [email address is not usable -- followup in the newsgroup] |
#4
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Battery polarity mistake
On Wed, 31 Aug 2016 15:46:33 +0100, Chris Green wrote:
DerbyBorn wrote: I have a electronic safe and the low battery light flashed so I bought 4 Duracell AAs for it. I accidentally put all 4 in the same way instead of one row in one dirction and the other opposite ( The originals had gold bands at both ends and I was working in the gloom with my varifocals at a bad angle) Within about half a minute when it appeared dead I realised my mistake. Will I have seriously shortened the life of the batteries with this mistake? If so, I will change them again. I doubt if you've done any harm at all. I'd *guess* that the four batteries should be in series to provide 6 volts or so. Putting all four in the same way will have produced zero volts, no current flows so no harm done. Agreed. Only all of them backwards might cause problems, but often the contacts only work on positive sticky out ends anyway. I am a *little* confused by you saying "one row in one dirction and the other opposite" though. How are the batteries arranged? Is it 'two and two' so what you have called 'one row' is a pair of cells? I assume it's 4 in series, folded round in half. A common system, one end is just a connection between the two battery ends, the other ends lead to the load. -- If trains stop at train stations, what happens at workstations? |
#5
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Battery polarity mistake
I assume it's 4 in series, folded round in half. A common system, one end is just a connection between the two battery ends, the other ends lead to the load. Yes - that is how I now understand it. |
#6
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Battery polarity mistake
On Wednesday, August 31, 2016 at 3:30:54 PM UTC+1, DerbyBorn wrote:
I have a electronic safe and the low battery light flashed so I bought 4 Duracell AAs for it. I accidentally put all 4 in the same way instead of one row in one dirction n. |
#7
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Battery polarity mistake
On 31/08/2016 15:30, DerbyBorn wrote:
I have a electronic safe and the low battery light flashed so I bought 4 Duracell AAs for it. I accidentally put all 4 in the same way instead of one row in one dirction and the other opposite ( The originals had gold bands at both ends and I was working in the gloom with my varifocals at a bad angle) Within about half a minute when it appeared dead I realised my mistake. Will I have seriously shortened the life of the batteries with this mistake? No. Normally all four would be connected in series to provide a 6V supply. by reversing 2, you create a circuit where close to zero current will flow, and so you will draw little or no energy from the cells. If so, I will change them again. -- Cheers, John. /================================================== ===============\ | Internode Ltd - http://www.internode.co.uk | |-----------------------------------------------------------------| | John Rumm - john(at)internode(dot)co(dot)uk | \================================================= ================/ |
#9
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Battery polarity mistake
Brian - It was difficult to fit them! I realise now that there was a spring at the end where I had pushed a positive. It was due to me working in the gloom of the bottom of my wardrobe and making wrong assumptions about the gold band on the old batteries. On reflection, I can't believe I did it wrong as I thought it was a bit unusual to have all 4 facing the same way. Two pairs in series. all okay now though - thanks. |
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