EASTRA 4 PCS C-Type USB Port to Type A Module/Board kit, Power Supply Electronic Components Electronic Hobby Kit

DESIGENED for 18650 battery DIY power bank: It is designed to charge 18650 3.7V lithium ion(li-ion) or lithium polymer (lipo) rechargeable batteries. AA, AAA, Nickle metal hydride rechargeable batteries or old batteries of different capacities are not directly compatible; chargeable batteries should be at least 3.5V (It also support lithium mobile phone battery and tablet battery). CONNECTION : It is possible to connect only one lithium battery or multiple lithium batteries in parallel. The capacity of connected battery should not exceed 10000 mAh, As long as the battery with a voltage of 3.5-4.2V is used. TERMINAL indication of this power bank pcb board: B+ is for battery positive terminal B- is for battery negative terminal. Input voltage:5V 1A or 5V 2A Note: The positive pole of the battery is connected to B+ and the negative pole is connected to B-, do not reverse it. If it is reversed, it will damage the circuit. PROTECTION Function: This is a mobile powerbank module with protection circuit of the boosted lithium battery has been integrated, prevent over-discharge, over-charge, overload short circuit protection, over current protection, and over temperature protection. APPLICATION: Compatible For major mobile Phone and tablet and other cellphones. Application - Suitable for various models of mobile phones that support wireless charging function. Also can be used in DIY project like flash light , torches, relays, buzzer, sensor, robotic projects, wireless and compatible with other modules also like tp4056, tpa 4056, lm2596, xl6009, mt3608, Peltier, bike phone charger.