2PCS Universal charging bottle for electric tools, suitable for 12V, 16V, 18V, 20V, 21V, and 25V lithium batteries with plug-in cables.

Compatible with 5.5*2.1 and 5.5*2.5 charging heads.

Primarily used to connect lithium-ion batteries for electric tools from different brands or voltage platforms (commonly referred to as ‘battery packs’ or ‘batteries’) to their corresponding chargers or devices. Compatible with 12V, 16V, 18V, 20V, 21V, and 25V lithium-ion batteries.
    * This cable is compatible with multiple common voltage platforms for electric tool lithium-ion batteries: 12V, 16V, 18V, 20V, 21V, and 25V.

2. Plug-in cable: This refers to a cable where both ends use metal plug-in connectors (also known as terminal plates or connectors) as connectors.

3. Core functions and applications:  
  Adapting to different interfaces: When the interface of your battery pack (the shape, size, and arrangement of the connectors) does not match the interface of your charger or target device, this cable can serve as a physical adapter.

Note: The red wire is the positive terminal, and the black wire is the negative terminal. This cable does not provide voltage conversion or protection functions! It is simply a conductor. 

Product Name：DC head to cold pressed terminal wire
DC connector: 5.5X2.1mm
Terminal specification: 5.5-14mm
Terminal material: copper
Wire length (including head): 27cm
Product current: low-current special
Product use: electric spanners and other universal charging cable