1.more than 800 cycle lifes 2.CE, ROHS, UN38.3, MSDS ... correct.3. There should be clear polar identifications,the identification should be correct check by voltage meter.4 ... connection included cell to cell, data wires between cells and BMS, BMS to the cell, BMS 2. to the discharging port ... will accelerated at higher temperature4. Don’t expose the battery to extremes of temperature over 60°C,directly ...