Battery Capacity: The Stealth Cam Sol-Pak Solar Battery Pack is available with a 3000mAh li-ion battery T-Swivel Brackets: The adjustable T-Swivel brackets can be positioned to blend seamlessly into their surroundings, while also easily gathering enough light to power your gear through back-to-back days of low-light conditions Durable: Durable weather-resistant ABS housing stands up to wind, rain and adverse weather Usage Methods: Panels can be used individually or strung together for loads of additional power and are compatible with any camera that has an external 12-volt DC jack Charge Indicator: The convenient LED battery-indicator lets you know at a glance how much life is left