Battery pack silver connects 18650 akku 36V-48V

Self made Lithium-ion Battery pack connects with fine silver springs.. No laptop cell use, they have too little power. Use only high power cells. Reusable, rechargeable battery pack. No short circuit due to possible overheating Battery is long mountain trips not warm. No change of the cell chemistry through heating in the solder or weld the cells. Therefore no BMS necessary Musical compositions, technical achievements and Video production from Guido Graeff