the iphone 4 has an internal battery but you can buy external batteries which are incorporated into a case/bumper, do these batteries run from + to -
i heard that batteries can transfer capacitance to other batteries so putting the negative poles of the 2 batteries together and leaving the 2 positive poles untouched can charge a battery of the same impedance ratio, here is a list of those ratios
2 AA=1 C
3 AA=1 D
1AA=3 9V
3 AAA=2 AA
3 AAA=1 C
1 AAA=2 D
9 AAA=1 9V
2 D= 9 9V
3 C=2 D
1 C= 3 9v
i was wondering how the iphone external batteries work, even with pins and wires it still must be either - to- or + to -
i heard that batteries can transfer capacitance to other batteries so putting the negative poles of the 2 batteries together and leaving the 2 positive poles untouched can charge a battery of the same impedance ratio, here is a list of those ratios
2 AA=1 C
3 AA=1 D
1AA=3 9V
3 AAA=2 AA
3 AAA=1 C
1 AAA=2 D
9 AAA=1 9V
2 D= 9 9V
3 C=2 D
1 C= 3 9v
i was wondering how the iphone external batteries work, even with pins and wires it still must be either - to- or + to -
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