This fully-automatic Harley-Davidson® Weatherproof Dual-Mode Battery Tender is perfect for short- or long-term motorcycle battery charging needs. Selectable charge options provide optimal charging for your Harley-Davidson Lithium LiFe or AGM Lead-Acid Batteries and, the waterproof housing ensures there won't be a problem even if water gets into your storage area. The vibration- and shock-resistant Battery Tender is reverse polarity protected and spark-proof, even when the leads touch. The Tender also includes an LED front panel to indicate the battery's state of charge. Time to recharge a fully discharged Lithium battery is 5-9 hours. Time to recharge a dead AGM battery is 8-12 hours.