Easy to Use: The solar panel will charge automatically in the daytime. Where is the sun, there is electricity Full Safety Protections: Built-in multiple protections including over-charge, over-discharge, over-voltage, over-current and more, the battery is fully protected, ensuring charging safety Wide Compatibility: Suitable for charging a car, automotive, marine, RV, power sport, boat, dump trailer, gate opener, fence and deep-cycle batteries, etc Waterproof Design: No worry about water or rain entering inside to damage the solar panel Lightweight and Compact: Light in weight, simple installation, very convenient to carry to outdoor mountains, grasslands, etc. for power generation and charging Specification: Material: PET Crystalline material: polycrystalline silicon Waterproof grade: IP65 Maximum power: 10W Working voltage: 12V Open circuit voltage: 13.8V Maximum current: 0.8A Short circuit current: 1.2A Product size: 334*203*16mm Battery clamp extension line length: 3m SLA battery voltage: 12V Temperature coefficient Isc: (010+/- 0.01) %/℃ Voc temperature coefficient: - (0.38 +/-0.01) %/℃ Power Voc temperature coefficient: -0.47%/℃ Temperature range: -40℃ to +80℃