Stealth Cam FieldMax External Rechargeable Battery 5,000MAH Rechargeable 5000 mAh lithium battery;Ideal for cameras in any location, any time of year, even where sunlight is in short supply;Easily withstands extreme temperature swings and adverse weather conditions;Virtually eliminates the need for disposable AA batteries;Provides extended power for cellular trail cameras;Cost-effective and eco-friendly solution