2 ADD-ON Solar Charging Panel Extensions for ReVIVE Series Solar ReStore XL External Backup Battery Pack (Not compatible with 1500mAh Model) - Triples your ReStore's solar charging speed! ADD-ON Panels triple solar charging speed and allows the Solar ReStore XL to charge to 100% capacity by solar power alone! Fully charges the internal battery of the ReVIVE Solar ReStore XL within 4.5 hours in direct sunlight Quickly connects to your ReVIVE Solar ReStore XL by spring loaded pins 280mA solar charging efficiency - Guaranteed Quality ** 3 Year Manufacturer's Warranty ** Compatible with Solar ReStore XL (4,000mAh), Solar ReStore XL+(6,000mAh), ReStore 9200 ReVIVE products