Battery Not Included, this adapter also does not latch to battery Includes 1 black battery adapter with 10 inches of 12 gauge wires installed All adapters now made in outdoor heat and chemical resistant material For use with M4 or #6 mounting screws Note:This is not a charger or converter, it only outputs battery voltage and power directly from your battery. Warning: To use this adapter properly, we recommend using a fuse thats rated about 30% higher than the max current you expect to draw. We also recommend adding a low voltage disconnect circuit or a timer to prevent the battery from dropping past low voltage threshold (which will damage the battery or shorten its life span); (Max battery voltage/4.2)*3.3 = typical low voltage threshold. To protect your device you should convert your voltage using a DCDC converter to match your device's acceptable voltage range. We do not recommend buying this item without fully understanding how to use it properly, protect the battery, and the device you intend to power. Do not use this adapter to charge your battery Do not short circuit battery or draw more than 20amps continuous Disconnect the battery before it reaches (Max battery voltage/4.2)*3.3 = typical low voltage threshold Do not leave battery charged at 100% for long periods of time, recommended to store battery at 70% charge (prolongs battery life) Do not leave battery outdoors (expecially in hot climates)