My first booster from another company on a 3S assembly (11.1V) has grown old over many years and started to start badly even Matiz. While he was young, they started the Subaru Legacy 2.5L at a temperature of -18 and the battery, which had run down to 3.5V. Bought this one. It is more interesting in that it has an active switching unit and a 14.8V output - there are much more chances to start the engine. More convenient to work due to this. He always travels with me in the trunk (in winter I take the battery into the heat). I'm always sure that I'll start up and leave, or help someone :)
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