Did you know that Cart Tek can service your Cart Tek Lithium Ion battery? For only $85 we send you a Lithium-Ion specific shipping box, you package up your battery with the enclosed shipping label, and drop off with FedEx. We'll diagnose and repair any issues with your battery, run an extensive test to verify the fix, and ship it back to you. If the battery is unfortunately damaged beyond repair, we will apply the full charge towards the cost of a replacement battery. This service is ONLY available in the Continental US. If you are located in Hawaii, please reach out to Battery Bill's for diagnosis and service of your Lithium ion battery.