18650-Module Battery Charging PCB Module with Overcharge Overdischarge Short Circuit Protection Dual USB 5V 1A 2.1A DIY USB Board (4pcs)

Description

Features:Size: 58MM*27MM*15MM.Input Port:micro USBInput Power Supply: DC 5VOutput Power Supply: DC 5V 1A 2.1APower Conversion:85%protection:overcharge protection,overdischarge protection, short circuit protection,over current protection,over temperature protectionPower Capacity Display:0-100%Note:1. The B+ and B- connected to the boosted battery must not be reversed.2. Long press the switch, the manboard will turn on the USB output,long press it again to turn off the USB output; Press the switch twice to turn on the lamp, and press twice again to turn off the lamp3. When use the board at first time, please connect 5V power adapter to the micro USB port to activate the board.It support multi battery in parallel connection.How to choose the right battery:The battery should be flat 18650-battery, 65mm long, pointed battery can not be used. If you use old batteries, different capacities, different brands are not available, disassemble the battery to ensure that each voltage is at least 3.5V or more, if the voltage is too low, then you can put it into the battery. (Note: You can also use lithium battery, mobile phone tablet battery)How to distinguish between battery +-pole and power box +-pole:In general, the 18650-battery has a negative electrode in the plane, and a positive hole in the hole. Must not be installed anti-battery, anti-burn once installed, and then loading pairs is useless.Why is there no power output after the battery is installed:After installing the battery, you must plug in the 5V charger to activate it.