Batteries...WHAT YOU SHOULD KNOW...for your philippine electrical concerns...needs...installation...orders...safeelectrical2013@gmail.com

Batteries Batteries use a chemical reaction to do work on charge and produce a voltagebetween their output terminals. The basic element is called an electrochemical cell and makes use of an oxidation/reduction reaction. An electrochemical cell which produces an external current is called a voltaic cell. Voltages generated by such cells have historically been referred to as emf (electromotive force). Carbon-zinc batteries Lead-acid batteries Alkaline cells

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Carbon-zinc Batteries The venerable carbon-zinc cell or Lechlanche' cell was invented in 1866 and was the most common small battery throughout most of the 20th century until largely supplanted byalkaline cells. The oxidation at the zinc electrode (the anode) is straightforward and similar to that in other cells like theDaniell cell. The other reactions involve the MnO2 which is contained near the carbon center rod and the NH4Cl and ZnCl2 which make up the bulk of the paste between the cathode and anode. The chemical reactions in this cell may be approximated by Zn(s) -> Zn2+(aq) + 2e- Anode 2NH4+(aq) + 2MnO2(s) + 2e- -> Mn2O3(s) + H2O(l) + 2NH3(aq) Cathode Some of the complexity of this reaction comes from the fact that the reduction of the ammonium ion produces two gaseous products 2NH4+(aq) + 2e- -> 2NH3(g) + H2(g) which must be absorbed to prevent the buildup of gas pressure. That is accomplished with two further reactions in the paste electrolyte. Zinc chloride reacts with ammonia to form solid zinc ammonium chloride and manganese dioxide reacts with hydrogen to form solid dimanganese trioxide plus water (Hewitt). ZnCl2(aq) + 2NH3(g) -> Zn(NH3)2Cl2(s) 2MnO2(s) + H2(g) -> Mn2O3(s) + H2O(l) The voltage of this cell is initially about 1.5 volts, but decreases as energy is taken from the cell. It also has a short shelf life and deteriorates rapidly in cold weather. Oxidation of the zinc wall eventually causes the contents to leak out, so such batteries should not be left in electric equipment for long periods. While these batteries have a long history of usefulness, they are declining in application since some of their problems are overcome inalkaline batteries. for your philippine electrical concerns...needs...installation...orders...safeelectrical2013@gmail.com METRO MANILA PHILIPPINES WIRE AND CABLE SUPPLIER IN METRO MANILA WIRE AND CABLE SUPPLIER IN QUEZON CITY WIRE AND CABLE SUPPLIER IN LUZON WIRE AND CABLE SUPPLIER IN VISAYA WIRE AND CABLE SUPPLIER IN SUBIC WIRE AND CABLE SUPPLIER IN CLARK WIRE AND CABLE SUPPLIER IN THE PHILIPPINES WIRE AND CABLE SUPPLIER IN THE PHILIPPINES ELECTRICAL SUPPLIER IN METRO MANILA ELECTRICAL SUPPLIER IN QUEZON CITY ELECTRICAL SUPPLIER IN LUZON ELECTRICAL SUPPLIER IN VISAYA ELECTRICAL SUPPLIER IN SUBIC ELECTRICAL SUPPLIER IN CLARK ELECTRICAL SUPPLIER IN PHILIPPINE INDUSTRIAL PARK ELECTRICAL SUPPLIER IN PHILIPPINE ECONOMIC ZONE ELECTRICAL SUPPLIER FOR PHILIPPINE FOREIGNERS ELECTRICAL SUPPLIER FOR PHILIPPINE PROVINCES FOR YOUR PHILIPPINE ELECTRICAL CONCERNS...NEEDS...INSTALLATION...QUOTATION...ORDERS KINDLY EMAIL US: SAFEELECTRICAL2013@GMAIL.COM                  SAFEELECTRICALONLINE@GMAIL.COM FOR YOUR PHILIPPINE ELECTRICAL CONCERNS...NEEDS...INSTALLATION...QUOTATION...ORDERS: KINDLY EMAIL US: SAFEELECTRICAL2013@GMAIL.COM                  SAFEELECTRICALONLINE@GMAIL.COM FOR PHILIPPINE INQUIRIES LIKE LIGHTNING ARRESTER SUPPLY AND INSTALLATION CONTACT US: FOR PHILIPPINE INQUIRIES LIKE LIGHTNING ARRESTER SUPPLY AND INSTALLATION CONTACT US: FOR PHILIPPINE INQUIRIES LIKE LIGHTNING ARRESTER SUPPLY AND INSTALLATION CONTACT US: MOBILE NUMBERS: SMART: +63 09079522099                        +63 09214026477                   GLOBE: +63 09273919600                        +63 09157920129                 SUN:   +63 9227192434                        +63 09336253505                 WIRELESS LANDLINE:   +63 4068727                                      +63 4922566                                 LANDLINE:    +63 4317553 HURRY..CALL US...NOW!!!! 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