BatteryMINDer Model 244CEC1: 24 Volt 1/2/4 AMP Battery Charger/Maintainer/Desulfator Designed for Trucks, Boats, RV, Generators EXTENDED BATTERY LIFE - Automatic full time desulfator reverses sulfation (a buildup of lead sulfate crystals) the primary cause of early battery failure by using a patented range of high frequencies to safely remove sulfation and recondition weak batteries. Sulfated batteries once considered beyond recovery can now be brought back to long-term useful condition. Extending battery life up to four times when compared to new batteries not being properly maintained. AMBIENT TEMPERATURE SENSOR - Temperature compensation precisely adjusts battery voltage based on temperature sensor readings. This ensures your battery will always be properly charged and maintained no matter what conditions it is subject to. Reverse polarity, short-circuit and over temperature protection. UP TO EIGHT BATTERIES AT A TIME - Maintains up to eight batteries at a time when connected in parallel. Requires the use of user-supplied wiring or Y-Connectors 210AY (sold separately). For all 24-volt sealed and wet filler caps batteries, including AGM, GEL, PLT and Odyssey. Ideal for winterizing Trucks, Boats, RV etc. INCLUDED  Included is Model 244CEC1, 6 AC cord, 6 DC cord with quick connector, installed ambient compensation sensor, battery clip cord set with quick connector and 15A replaceable fuse, & 2 ring terminal cord set with quick connect and 15A replaceable fuse. Not for Aviation Use. FCC CERTIFIED - Certified by the Federal Communications Commission and California Energy Commission Compliant. If you know the battery is charged and in good shape use the <span class="a-text-bold">1 Amp</span> setting. If you are charging a large deep cycle battery or more than one battery than use 2<span class="a-text-bold"> Amp</span> setting. You will probably use the wet/AGM/sealed selection most of the time. Use the Odyssey selection on all named Odyssey batteries at the <span class="a-text-bold">4 Amp</span> setting. Includes Short circuit, spark, reverse polarity protection, thermal runaway protection, automatic D/C disconnect on A/C failure and quick-connect/disconnect fused alligator clip assembly Push-Button Selection for ALL battery types and charge rates. Detects and rejects batteries with bad cells. Diagnoses batterys condition / state-of-charge. Maximize battery life and capacity, recovers weak batteries. 100% Full - Time U.S. Patented Pulse-type Desulfation keeps battery free of sulfate or dissolves sulfate completely in older batteries. Auto-Restart after power failure. 18 LED indicators show state-of-charge and important status mode / battery condition. Rugged, vibration-resistant construction. ECO-mode with hi-efficiency / low power consumption. Model 244CEC1 Charger-Maintainer-Desulfator 6&#039; AC cord, 6&#039; DC cord with quick connector (SAE) Auto-Temp Compensation Sensor (installed) Battery Clip Cord Set with Quick Connector and 15A replaceable fuse 2&#039; Ring Terminal Cord Set with Quick Connect Ring Terminal Assembly and 15A replaceable fuse