This guide explains how to charge your Ekrin B37S and check common connection problems. The B37S uses its original Ekrin AC/DC wall adapter with a round barrel connector. The replacement adapter must match 26V DC, 900mA, center positive, 5.5mm outer

<p>This guide explains how to charge your Ekrin B37S and check common connection problems.</p><p>The B37S uses its original Ekrin AC/DC wall adapter with a round barrel connector. The replacement adapter must match <strong>26V DC, 900mA, center positive, 5.5mm outer / 2.1mm inner barrel plug</strong>. Do not choose an adapter simply because the plug fits.</p><p>For travel, check the input-voltage range on your adapter&#x2019;s label and use a suitable mains plug adapter for your destination. A mains plug adapter does not change the charger&#x2019;s DC output.</p><h2 id="charging-steps">Charging steps</h2><ol><li>Turn the device off before connecting power. Do not use it while charging.</li><li>Connect the correct cable or adapter securely to the device and power source.</li><li>Check the charging indicator using the manual for your exact model/generation. Indicator colors and sequences can differ.</li><li>Disconnect the charger when charging is complete. Charge time varies with the power source, cable, and battery level.</li></ol><h2 id="if-it-will-not-charge">If it will not charge</h2><ol><li>First confirm the adapter and cable match the model and port described above.</li><li>Check the cable, connector, and charging port for visible damage. Keep the port dry; do not insert tools into it.</li><li>Try a different wall outlet.</li><li>If there is still no charging response, or the battery will not hold a charge, contact support.</li></ol><h2 id="battery-care">Battery care</h2><p>Charge in a cool, dry place. Recharge before extended storage and periodically while unused. You do not need to deliberately drain the battery completely before recharging.</p><p>Use the <a href="https://help.ekrin.com/en-US/user-manuals-363015">manual for your model and generation</a> for its charging indicators and operating instructions.</p><p><a href="https://www.ekrin.com/products/365-bantam-usb-charging-cable">Replacement USB cable for Bantam, 365, Kestrel, and B37 v2</a>. For B37 v1 or B37S adapters, contact support to confirm the correct replacement.</p><p>Still need help? Email <a href="mailto:support@ekrin.com">support@ekrin.com</a> with your model, order number or receipt, issue description, and photos or video where possible. See <a href="https://help.ekrin.com/en-US/how-do-i-make-a-warranty-claim-363227">warranty coverage and claim instructions</a>. Do not open or attempt to repair the device yourself.</p>

How to Charge Your B37S Massage Gun

Your Ekrin B37S is covered by our limited lifetime warranty for defects in materials and workmanship during ordinary personal use, subject to the published terms. For the common coverage rules, registration requirements, and claim instructions, see W

<p>Your Ekrin B37S is covered by our limited lifetime warranty for defects in materials and workmanship during ordinary personal use, subject to the published terms.</p><p>For the common coverage rules, registration requirements, and claim instructions, see <a href="https://help.ekrin.com/en-US/how-do-i-make-a-warranty-claim-363227">Warranty coverage, registration, and claims</a>.</p><h2 id="coverage-at-a-glance">Coverage at a glance</h2><ul><li>Covered components include the motor, housing, and attachments for defects covered by the warranty.</li><li>The internal battery has a two-year warranty from purchase; normal capacity degradation is excluded.</li><li>Open-box devices have a one-year warranty.</li><li>Replacement units carry a 90-day warranty. A full replacement more than one year after initial purchase fulfills the lifetime warranty under the published policy, with exceptions at Ekrin&#x2019;s discretion.</li><li>Customers outside the United States pay shipping fees and applicable import duties on warranty items.</li></ul><h2 id="registration-and-proof-of-purchase">Registration and proof of purchase</h2><ul><li><strong>Purchased directly from ekrin.com:</strong> Warranty registration is not required. Include your Ekrin order details when requesting service so we can locate the purchase.</li><li><strong>Purchased from Amazon.com:</strong> Provide a verifiable Amazon order ID or register your product. Registration is not required when you can provide a verifiable Amazon order ID.</li><li><strong>Other authorized retailers:</strong> Register within 30 days of receipt under the existing registration requirements. Contact support if you need help verifying a purchase.</li></ul><p>For gifts, the requirements follow the original purchase channel. If registering a gift, enter &#x201C;Gift&#x201D; in the order-number field. Use the <a href="https://www.ekrin.com/pages/warranty">warranty registration page</a> when registration is needed, or email <a href="mailto:support@ekrin.com">support@ekrin.com</a> for help.</p><h2 id="how-to-request-warranty-service">How to request warranty service</h2><p>To request warranty service, email <a href="mailto:support@ekrin.com">support@ekrin.com</a> with your model, receipt or order number, purchase date, retailer, issue description, and photos or video where possible. Include the serial number if available. The registration page is for registering your product; warranty-service requests go to our Customer Care Team.</p><p>Coverage is nontransferable. Proof of purchase may be required. Exclusions include cosmetic damage, misuse, accidents, liquid damage, unauthorized repairs or modifications, use contrary to the manual, and commercial or professional use. Read the <a href="https://www.ekrin.com/pages/warranty">full warranty terms</a> for complete details.</p><p>For a change-of-mind return, see <a href="https://help.ekrin.com/en-US/how-do-i-return-my-massager-363232">how to return your massager</a>.</p>

Warranty Information for B37S Massage Gun

Open or download the B37S manual (PDF). If the embedded PDF does not display, use the download link above. Need help selecting a manual? Email support@ekrin.com with your model and a photo of the charging port.

<p><a href="https://cdn.shopify.com/s/files/1/0080/5342/4180/files/B37S_Manual.pdf?v=1748542756">Open or download the B37S manual (PDF)</a></p><p>If the embedded PDF does not display, use the download link above. Need help selecting a manual? Email <a href="mailto:support@ekrin.com">support@ekrin.com</a> with your model and a photo of the charging port.</p><p><iframe src="https://cdn.shopify.com/s/files/1/0080/5342/4180/files/B37S_Manual.pdf?v=1748542756" width="100%" height="800px" style="border: none;"> </iframe></p>

B37S User Manual

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Ekrin Athletics

Everything you need to get the most out of your Ekrin Athletics B37S Massage Gun.
Explore setup instructions, charging tips, care guidelines, troubleshooting help, and warranty information—all in one place to ensure peak performance and long-term us

B37S

Product Guides & Manuals

Charging

Charging Adapter & Cable Replacement

Measurements and Specifications

HSA/FSA FAQ

Ordering Extra Heads

Accessories & Buying Help

How do I return my Massager?

How do I make a Warranty Claim?

Open-Box Items

Returns & Warranty

Shipping Policies

Shipping Carriers

Orders & Delivery

User Manuals

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How to Charge Your Ekrin Bantam Massage Gun

Warranty Information For Ekrin Bantam Massage Gun

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How to Charge Your Ekrin 365 Massage Gun

Warranty Information for the Ekrin 365 Massage Gun

365 Manual

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Warranty Information For Ekrin B37 Massage Gun

B37 Manual

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How to Charge Your Ekrin Kestrel Massage Gun

Warranty Information For Kestrel Massage Gun

Kestrel Manuals

Kestrel

Hummingbird User Manual

How to Charge Your Ekrin Hummingbird

Getting Started with the Ekrin Hummingbird

Hummingbird Care and Troubleshooting

Hummingbird

Troubleshooting Your Ekrin Bantam Massage Gun

Troubleshooting Your Ekrin 365 Massage Gun

Troubleshooting Your Ekrin Athletics B37 Massage Gun

Troubleshooting Your Ekrin Kestrel Massage Gun

Troubleshooting Your B37S Massage Gun

How to Care for Your Ekrin Bantam Massage Gun

How to Care for Your Ekrin 365 Massage Gun

How to Care for Your Ekrin Athletics B37 Massage Gun

How to Care for Your Ekrin Kestrel Massage Gun

How to Care for Your Ekrin B37S Massage Gun

Issues with Attachments

Troubleshooting & Care