Keystone 26650 holders are widely considered to be the finest 26650 battery holders available. These are original Keystone parts.
These battery holders have a new type of solder tab made for soldering wires directly to the contacts.
Nickel plated contacts.
Holds two 26650 batteries.
The heat resistant nylon body is marked with series polarity but the battery contacts are not physically connected. That means that they can be wired in either a parallel or series configuration depending on which contacts you connect.