Benefits:Maintenance free, no need to recharge during storage! Work from -40°C up to 65°C. Ultra capacitor technology with quick recharge. Short-circuits and reverse polarity protection. Easy to use: 3 steps ➊ Connect ➋ Press ON & wait 100 seconds ➌ Turn on engine. Rechargeable in 100 Seconds only! 2 additional modes : “Bypass” for a recent vehicle with deeply discharged battery and “Glow” for starting Diesel vehicles with cold pre-heating time