Stanley Bm1S 12-Volt 1-Amp Battery Charger/Maintainer, Bm1S

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Fully automatic, high-frequency battery charger/maintainer;
compact form factor makes it easy to mount and store;
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Compatible with all AGM, GEL, and WET automotive/marine batteries;
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Impact-resistant polymer housing is sealed from dust and oil-resistant;
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2 ways to charge with included terminal O-rings and battery clamps;
automatically stops charging when battery is fully charged or topped off then switches to float mode monitoring;
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Built-in circuit protection guards against overcharging, reverse polarity, or short circuit;
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Includes battery clamps, O-rings, and manual;