Ekrin's B37S is positioned as an athletic recovery tool, and the company offers a lifetime warranty against defects in materials/workmanship, which suggests long-term support expectations. However, a conservative dataset lifespan should still assume a finite ownership window for consumables like batteries and ports; 5 years is a cautious practical service-life target even when a warranty is longer.
Price varies by bundles and promos, but a representative mid-market price around $299 keeps the model grounded for replacement decisions. Repair is usually worthwhile when the issue is localized (charging port, switch) or when warranty coverage applies.
Replace becomes more sensible when the device has repeated battery failures, internal rattles that indicate drivetrain wear, or water/sweat intrusion that damages electronics. If the battery will not hold charge and the cost to service approaches the threshold, replacement avoids recurring downtime for heavy training schedules.