If you own multiple vehicles, you understand the frustration of a dead battery. The battery life of most vehicles and tools can be fickle when left alone for extended periods of time. Your solution is to use the best battery chargers to maintain their charge while not in use. For that, the Schumacher SP-200 Solar Battery Maintainer is an ideal candidate.\r\n\r\nWhy We Like It - Schumacher SP-200 Solar Battery Maintainer\r\nA great way to keep stationary vehicles and tools from experiencing a dead battery by maintaining them with just a small amount of wattage.\r\n\r\nPerformance\r\nOn the surface, the Schumacher SP-200 Solar Panel isn\u2019t a powerhouse. It juices up a car battery or mower with just 2.4W. As a charger, that\u2019s not much\u2014but as a battery maintainer, it\u2019s different. It\u2019s built to provide just enough charge to batteries to keep them from dying when not in use, unlike the DieHard 71219 Battery Charger Maintainer that charges. Think of it like this: during the winter you turn your car on to heat it up beforehand. The SP-200 essentially keeps your battery \u201cwarm\u201d and ready to go when it\u2019s needed.\r\nDesign\r\nTypical with solar chargers, the Schumacher SP-200 Solar Battery Maintainer does not need power for its operation; it uses solar energy, an environment-friendly alternative. Even under cloudy conditions the SP-200 works just fine, and it\u2019s water resistant. It also has mounting screws. However, when it\u2019s in use, the battery maintainer doesn\u2019t have any indicators to tell you it\u2019s actually working. It is, by the way, but it doesn\u2019t let you know that, unlike the tons of information the Ampeak Battery Charger Maintainer Automatic provides. Lastly, the cables are a tad bit too short.\r\nValue\r\nThe Schumacher SP-200 Solar Battery Maintainer is a pitiful $27 on Amazon. Considering what the Schumacher SP-200 is, what it offers, and how it offers its features, that\u2019s definitely a very small price to pay to maintain the batteries of vehicles and other tools when they\u2019re not in use\u2014provided they\u2019re 12V lead acid batteries. However, if straight car chargers are what you\u2019re looking for, its brother, the Schumacher SC1281 Automatic Battery Charger is perfect.\r\nSchumacher SP-200 Solar Battery Maintainer Wrap Up\r\nDon\u2019t knock the Schumacher SP-200 Solar Battery Maintainer for what it is: it doesn\u2019t charge, but rather maintains batteries when not in use. That kind of feature prevents dead batteries when turning the key. It\u2019s water resistant and works under cloudy conditions. That\u2019s more than you can ask from a solar-based battery maintainer. Being friendlier to the environment is a bonus.