Reddit reviews BatteryMINDer 1510: 12 Volt-1.5 Amp Battery Charger, Battery Maintainer, and Battery Desulfator – Designed for Cars, Trucks, Motorcycles, ATV, Boats, RV

EXTENDED BATTERY LIFE - Automatic full time desulfator reverses sulfation (a build up 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 - Installed 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.FOUR BATTERIES AT A TIME - Maintains up to four batteries at a time when connected in parallel. Requires the use of Y-Connectors 210AY (sold separately). Ideal for winterizing Cars, Trucks, Motorcycles, ATV, Boat, RV, etc. The 90-240V AC 47-63 Hz input allows for worldwide use.Boat, RV, etc. The 90-240V AC 47-63 Hz input allows for worldwide use.FCC CERTIFIED - Certified by the California Energy Commission as meeting the current efficiency standards, which means it meets strict energy efficiency guidelines set by the US Environmental Protection Agency and the Department of Energy.