20 Pieces TP4056 Charging Module Battery Charging Board with Battery for Protection 18650 BMS 5V Micro USB 1A 186 50 Charge Module Features: there are 20 pieces TP4056 charging modules in our package, practical tools for you, which can also meet your various needs, enough for you to change and replace Details: the charging board inputs with micro USB female, can be directly inputed to do with phone charger rechargeable battery, still retains the input voltage wiring pads, convenient for you to DIY; Charging cut-off voltage: 4.2V, max charge current: 1000 mA Function introduction: input voltage is 5V, battery over-discharge for protection voltage is 2.5V, battery over current for protection current is 3A; Connect the battery to the B+ B-, inserted into the USB female mobile phone charger, the red light is being charged and the green light to full Suitable occasion: the battery charging board is applied for single-cell lithium battery or multi-cell parallel lithium battery charging, and the charging port can be powered from USB, which are convenient for you to operate Specifications: Input voltage: 5V Charging cut-off voltage: 4.2V Maximum charge current: 1000mA Battery over discharge for protection voltage: 2.5V Battery over current for protection current: 3A Board size: 2.6 x 1.7 for cm Notice: please note that the charge should disconnect the load OUT terminal on the positive and negative can not be wrong, please according to specifications, otherwise it will break directly; The ammeter for testing current can only be connected in series with the 5V input terminal of the charging board Package included: 20 x TP4056 Charging Modules