To determine the battery that will work with your product please review the below information.
Inside your jacket product on the lower left side, where you plug the battery into the jacket, determine if there are 3 lines or 4 along the wire.
If there are 4, this is the correct battery for your product.
If there are 3 please see this direct link for your proper battery: https://dragonheatwear.com/products/additional-replacement-dragon-heatwear-battery
If you have any questions, please contact us at 801.228.1948 before ordering your additional batteries.