Battery Tender® 15‑Watt Solar Tender® Charger with Built‑in 3‑Step Microprocessor Controller, 0.83 A Output, 12 V DC

15-Watt Solar Panel: Provides efficient charging and maintenance for 12V batteries. Built-In Microprocessor Controller: 3-step automatic controller prevents overcharging for safe, reliable performance. Spark proof Design: Ensures safe operation during charging. Portable and Lightweight: Approx. 8 lbs., perfect for off-grid or storage use without power access. 5-Year Warranty: Backed by a solid 5-year warranty for peace of mind.