21700 DIY Power Bank Case Kit with Fast Charging 4 Slots No Batteries Included

Attention: 1. Batteries have a life cycle, loaded batteries to ensure the appearance of whether intact without broken skin, the voltage should be between 3.2V-4.2, the battery used for a long time the internal resistance will be elevated, internal resistance is too high will affect the motherboard normal boost and high-power output load current limiting, remember not to use the old/broken skin of the batteries, as well as false labeling of the capacity of the battery is too poor. 2. This product is a semi-finished parts easily damaged, so it is prohibited to fall / battery positive and negative poles to look good and then put in the use of flat 21700 batteries, the wrong into the motherboard will lead to burn out, serious will also cause an explosion, remember to buy this product need to have a certain understanding of the DIY battery box products, do not understand the caution to buy, before purchasing, you can consult the customer service !!!!!!!! Features: 1. [Supports fast charging] 2 * USB fast charging output port+1 * TYPE-C interface supports PD fast charging (input/output)+1 * suitable for IOS interface. 2. [Power Display] The amount of electricity used can be monitored at any time, and the power level is clear at a glance. 3. [20 Light Beads] can light up, 20 light beads can light up, and can also be used as a small night light. 4. [Solder Free] Can be used to install 4 * 21700 lithium batteries (flat head) without welding. The batteries can be installed correctly for use. Convenient, fast, and detachable. 5. [Widely Used] Mini and compact, capable of DIY battery placement, convenient and fast, essential for outdoor home/travel. Specifications: Supported battery cells: 4 * 21700 model batteries Product size: 17 * 5.55 * 4.15CM Color: Black/Orange Charging parameters: 5V2A/5V3A/9V2A/12V1.5A Output parameters: 5V2A/15V3A/5V4.5A14.5V5A/9V2A/12V1.5A Package List: Main board * 1 Shell * 1 Front and rear cover plates * 2 Screws * 8