High-Capacity Smartwatch Batteries & Replacement Cells

Is your wearable struggling to last a full day or cutting out during workouts? At Fix Screens, we supply premium smartwatch battery replacements for Garmin, Fitbit, and Samsung devices. Our high-density lithium-ion cells are tested for capacity and voltage stability, ensuring your tracker regains its original runtime. Order today for same-day UK dispatch before 12pm.

+ View Battery Compatibility & DIY Installation Support

Restore Your Device’s Longevity

Lithium-ion batteries naturally degrade over hundreds of charge cycles. If your Fenix, Forerunner, or Versa is experiencing rapid drain, a smartwatch battery replacement is the most sustainable way to keep your device out of landfill. We source cells that meet or exceed original specifications, including:

  • Garmin Batteries: High-cycle cells for the Fenix and Forerunner series.
  • Fitbit Batteries: Specialist slimline packs for the Charge and Sense models.
  • Samsung Watch Batteries: Precision-fit cells for the Galaxy Watch series.

Expert DIY Tools:

Replacing a smartwatch battery often requires de-soldering or navigating delicate ribbon cables. To assist your repair, we recommend our Professional Repair Toolkits. All our batteries are backed by a 6-month warranty against manufacturing defects.

Why Choose Fix Screens for Batteries?

Low-quality batteries can swell and damage your smartwatch screen from the inside. We only stock batteries with integrated protection circuits (PCM) to prevent overcharging and overheating. If you prefer not to perform the repair yourself, we also offer a Professional Mail-In Service where our technicians can handle the installation for you.

Technical Tip: To maintain your new battery’s health, avoid letting it drop to 0% frequently and use a high-quality charging cable from our tested range.

Order your smartwatch battery today before 12pm for same-day UK dispatch. For help identifying the correct battery for your specific model, please contact our technical team.