<P> In the absorbed glass mat design , or AGM for short , the separators between the plates are replaced by a glass fibre mat soaked in electrolyte . There is only enough electrolyte in the mat to keep it wet , and if the battery is punctured the electrolyte will not flow out of the mats . Principally the purpose of replacing liquid electrolyte in a flooded battery with a semi-saturated fiberglass mat is to substantially increase the gas transport through the separator ; Hydrogen or Oxygen gas produced during overcharge or charge ( if the charge current is excessive ) is able to freely pass through the glass mat and reduce or oxidize the opposing plate respectively . In a flooded cell the bubbles of gas float to the top of the battery and are lost to the atmosphere . This mechanism for the gas produced to recombine and the additional benefit of a semi saturated cell providing no substantial leakage of electrolyte upon physical puncture of the battery case allows the battery to be completely sealed , which makes them useful in portable devices and similar roles , additionally the battery can be installed in any orientation , though if it is installed upside down then acid may be blown out through the over pressure vent . </P>
<P> In the absorbed glass mat design , or AGM for short , the separators between the plates are replaced by a glass fibre mat soaked in electrolyte . There is only enough electrolyte in the mat to keep it wet , and if the battery is punctured the electrolyte will not flow out of the mats . Principally the purpose of replacing liquid electrolyte in a flooded battery with a semi-saturated fiberglass mat is to substantially increase the gas transport through the separator ; Hydrogen or Oxygen gas produced during overcharge or charge ( if the charge current is excessive ) is able to freely pass through the glass mat and reduce or oxidize the opposing plate respectively . In a flooded cell the bubbles of gas float to the top of the battery and are lost to the atmosphere . This mechanism for the gas produced to recombine and the additional benefit of a semi saturated cell providing no substantial leakage of electrolyte upon physical puncture of the battery case allows the battery to be completely sealed , which makes them useful in portable devices and similar roles , additionally the battery can be installed in any orientation , though if it is installed upside down then acid may be blown out through the over pressure vent . </P>
what gas does a lead acid battery give off
what gas does a lead acid battery give off
Hydrogen or Oxygen gas
Hydrogen or Oxygen gas