LiFePO4 Car Start Battery,According to the authoritative test, Real vehicle test, fuel-saving effect is up to 5 %,. According to the authoritative test, ... Real vehicle test, fuel-saving effect is up to 5 %, the CO and HC emissions also reduce accordingly, ... densitySmall volume and lightweightLong cycle lifespanNo pollution, eco-friendly5 to 6 times life than lead acid cells, 1/3 ...