A RECHARGEABLE BATTERY DESIGNED FOR A GAS DETECTOR. IT IS A LITHIUM-ION BATTERY MADE OF A LITHIUM POLYMER MATERIAL . THE BATTERY HAS TO BE CHARGED ONLY IN A SAFE AREA THAT IS FREE OF HAZARDOUS GAS. AN INDICATION THAT THE BATTERY NEEDS CHARGING IS WHEN THE DETECTOR EMITS A LOW BATTERY ALARM.

THIS RECHARGEABLE BATTERY FOR A GAS DETECTOR IS CLASSIFIED TO COMMODITY CODE 8507803090 IN ACCORDANCE WITH THE FOLLOWING: GENERAL INTERPRETATIVE RULES (GIR) GIR 1 HAS BEEN USED TO CLASSIFY THIS PRODUCT BY THE TERMS OF HEADING 8507 ELECTRIC ACCUMULATORS, INCUDING SEPARATORS THEREFOR, WHETHER OR NOT RECTANGULAR (INCLUDING SQUARE): GIR6 HAS BEEN USED TO CLASSIFY THE GOODS TO SUBHEADING LEVEL HARMONISED SYSTEM EXPLANATORY NOTE 8507 ELECTRIC ACCUMULATORS (STORAGE BATTERIES OR SECONDARY BATTERIES) ARE CHARACTERISED BY THE FACT THAT THE ELECTROCHEMICAL ACTION IS REVERSIBLE SO THAT THE ACCUMULATOR MAY BE RECHARGED. THEY ARE USED TO STORE ELECTRICITY AND SUPPLY IT WHEN REQUIRED. A DIRECT CURRENT IS PASSED THROUGH THE ACCUMULATOR PRODUCING CERTAIN CHEMICAL CHANGES (CHARGING); WHEN THE TERMINALS OF THE ACCUMULATOR ARE SUBSEQUENTLY CONNECTED TO AN EXTERNAL CIRCUIT THESE CHEMICAL CHANGES REVERSE AND PRODUCE A DIRECT CURRENT IN THE EXTERNAL CIRCUIT (DISCHARGING). THE CYCLE OF OPERATIONS, CHARGING AND DISCHARGING, CAN BE REPEATED FOR THE LIFE OF THE ACCUMULATOR.