Teuypty Variable Voltage DC Power Supply Portable Adjustable V3.1-Bench Source for Electronics Repair, Lab& DIY Long

Input Voltage: 5-20V, built-in 2 pieces of 18650 batteries. Supports external power supply via USB PD, DC or . The long banana plug can clamp wires, while the short one cannot. All other features are identical. This product uses a 4mm banana socket, compatible with all standard 4mm banana plugs. For self-made use, lantern-type banana plugs are recommended for better performance. When removing the battery, pry it gently from the negative terminal side to avoid short circuit caused by contact of the positive terminal. The spring leaf of the 18650 battery holder is relatively high. This package does not include batteries. It is recommended to adjust the spring leaf slightly with pliers before installation for easier battery mounting and removal. Note: The power supply can work up to 24V maximum, but some switching power supplies may burn the power chip. If 24V operation is required, prepare an extra power board for testing; the board is replaceable if damaged.