1A Charging can chan current Product characteristics and parameters Up to 1A programmable linear charging current Used for single 3.7V lithium battery, full 4.2V Constant current/constant charging, with overtemperature protect Soft start limit sur current, with battery backconnect protect Low power consumpt standby, prolong battery life Charging status dual output, no battery and fault status display OV activat,2.9V trickle charging Operating temperature -40~80 Input ran 4.2V~6.5V The output is adjustable from 4.2V-28V Maximum power: 5W Char indicator light descript The module can roughly jud the working state by two LED states, CHRG is red light, STDBY is blue light. When the battery is chard, the red light is on and the blue light is off. When the battery is fully chard, the blue light is on and the red light is slightly on. If there is a boost output, depending on the output power is different, it is possible to char the red light - straight bright, not connected with no load, blue light, red light slightly. The module supports type-c interface input and solder joint input marked behind the input. Choose one or the other. The recommended is about 5V. The module is labeled with two outputs that are the same, and the lines are parallel, so you can choose one of them. The following focuses on connecting the battery. If your battery comes with a protect board, you can choose our packa without dischar protect. After B+ and B- are connected to the battery, it must be short connected to T point before charging and discharging. If your battery does not take protect plate, choose the packa with dischar protect, this is very important, because the battery dischar is likely to cause battery scrap, similar competitive products are mostly without dischar protect, battery connected B+ and B-, can not be short T point, otherwise the dischar protect will fail. After connecting the cable, you can use the screwdriver to adjust the output you want. Battery select is 3.7V lithium battery, full is 4.2V, battery type can be 18650, polymer battery. Product size Instructs for use * Product for linear charging, heating is normal, rest assured to use * Batteries can only be connected in parallel, not in series. * Charging current is the best battery capacity 0.37C, is the capacity of 0.37 times such as 1000mAH battery charging current 400 so it is enough. * The charging connect wire should not be too thin or too long. This connect resistance is high. If it is too thin, the battery will drop more. * Good contact with battery connect. Otherwise, after flushing the battery will drop more. * It is normal to heat up when the current is lar during booster operat. The larr the current is, the hotter it is, which is a normal phenomenon. The chip with overheating protect can be used safely. Related Products:bms,4s bms,bms 4s,pcb bms protection board,battery bms,bms board,lithium battery protection board,protection board Excellent performance super small lithium charging booster module Ultra-thin and ultra-mini design Preferably chip quality control Adjustable output with boost Optal Whether to use battery protect