What may happen to a lead battery when overcharged?

acid leak
polarization switch
explosion
sulfurization
Any lead­-acid battery system when over­charged will produce hydrogen gas by elec­trol­y­sis of water. If the rate of over­charge is small, the vents of each cell allow the dis­si­pa­tion of the gas. A severe over­charge may produce a flammable con­cen­tra­tion of hy­dro­gen.

Answers distribution

acid leak
polarization switch
explosion
sulfurization
answers
flagSwitzerland
21%
5%
64%
8%
37
flagFrance
20%
4%
59%
11%
62
flagNorway
19%
10%
58%
10%
46
flagMalaysia
22%
12%
57%
7%
40
flagPakistan
17%
12%
54%
12%
57
flagGermany
21%
7%
53%
17%
290
flagPoland
23%
11%
52%
12%
21759
flagSweden
17%
6%
52%
23%
46
flagItaly
22%
11%
52%
13%
36
flagSouth Africa
29%
11%
51%
7%
27
flagCanada
21%
8%
50%
18%
79
flagAustralia
18%
13%
50%
14%
69
flagthe United Kingdom
24%
10%
49%
13%
606
flagthe United States
27%
11%
46%
13%
1048
flagBelgium
26%
11%
46%
15%
26
flagIndia
24%
13%
45%
13%
630
flagthe Netherlands
29%
9%
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16%
75
flagthe Philippines
31%
15%
40%
9%
66
flagRepublic of Ireland
25%
9%
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26%
52
flagUnknown
34%
19%
32%
12%
1240

Gender

men41%
women40%
acid leak
29%
27%
polarization switch
14%
17%
explosion
41%
40%
sulfurization
15%
14%

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What may happen to a lead battery when overcharged?
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Illustration: Charles Williams
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