How to Charge Your Ekrin Athletics B37 Massage GunUpdated 21 days ago

This guide explains how to charge your Ekrin B37 and check common connection problems.

Identify your B37 before charging

• B37 v1: Round barrel charging socket; use the original Ekrin AC/DC adapter, rated 26V DC, 900mA, center positive, 5.5mm outer / 2.1mm inner barrel plug. A plug fitting the socket does not prove electrical compatibility.
• B37 v2: USB-C charging socket; use the supplied cable with a suitable USB-C Power Delivery (PD) power source.

The B37 was updated in 2024. Identify yours by the physical charging port rather than purchase date alone. USB-C instructions do not apply to the original barrel-charging model.

Charging steps

1. Turn the device off before connecting power. Do not use it while charging.
2. Connect the correct cable or adapter securely to the device and power source.
3. Check the charging indicator using the manual for your exact model/generation. Indicator colors and sequences can differ.
4. Disconnect the charger when charging is complete. Charge time varies with the power source, cable, and battery level.

If it will not charge

1. First confirm the adapter and cable match the model and port described above.
2. Check the cable, connector, and charging port for visible damage. Keep the port dry; do not insert tools into it.
3. Try a different wall outlet (for v2, also test a known-working USB-C PD source).
4. If there is still no charging response, or the battery will not hold a charge, contact support.

Battery care

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.

Use the manual for your model and generation for its charging indicators and operating instructions.

Replacement USB cable for Bantam, 365, Kestrel, and B37 v2. For B37 v1 or B37S adapters, contact support to confirm the correct replacement.

Still need help? Email [email protected] with your model, order number or receipt, issue description, and photos or video where possible. See warranty coverage and claim instructions. Do not open or attempt to repair the device yourself.