3. Battery Not Included: The wall light control board requires you to purchase AA batteries locally, as the remote control does not come with them included. 2. 3.2V LiFePO4 and 3.7V Lithium Battery Compatibility: This solar light circuit board can be used to retrofit or repair integrated solar lights, providing compatibility with 3.2V LiFePO4 and 3.7V lithium batteries. 4. Pre-soldered Wiring for Easy Use: The solar light controller comes with pre-soldered lines, making it convenient and straightforward for users to install and operate. 1. No Overcharge and Overdischarge Protection: The solar street light controller board does not come with built-in overcharge and overdischarge protection features. It requires a battery with an protection board for safety during operation. 5. Suit for Modifications: The automatic control lamp board is perfect for those who want to modify or repair their solar street light systems, offering reliable performance and adaptability., Weight: 0.09479877266 Pounds, Manufacturer: Wesafrae