Please enter your email address and we’ll send you a link to reset your password right away.

An email has been sent to the address you provided. Please note that it may take up to 5 minutes to arrive.
Please make sure to check your Spam folder in case your email service provider redirected it there.
Note: The link will remain active for 24 hours from the moment you receive it.

E-mail

Oops! This email address is incorrect or not registered.

Your VIP area awaits in the APP

Log in to the app to manage your account, orders, and exclusive benefits.

Order tracking

Personalized notifications

Exclusive offers

The email or password is incorrect.

E-mail

Password

Forgotten your password?

Tradeinn Retail Services as the data controller will process your data in order to manage registered users on our website and process your order, as well as the sending of advertising related to the products and services. You can access, rectify and delete your data, as well as exercise other rights by consulting the additional and detailed information on data protection in our Privacy Policy.

First Name

Last name

E-mail

Repeat E-mail

Password * * Passwords must be at least 6 characters long.

Confirm password

Oops! This email address is already registered.

I have read and accept the conditions contained in the Privacy Policy on processing of my data to manage my order

I want to receive discounts, special deals, and exclusive offers by email.

Create account

Staying signed in lets you shop faster, check your orders, and access your favorites without signing in again.

Stay signed in

Log out

Language: English

Select a country

Always the best online price!

Fitness shop

by tradeinn

Shipping to:

Product successfully added to your basket

View basket Continue shopping Back to PC configurator

There´s nothing in your basket right now.

Total quantity:

Order subtotal €

Use a photo to find your product

Filters

Gender

Sigma Batteries for fitness electronics

()

Opportunities available with immediate delivery

Find Electronics from Sigma for fitness

Powering Your Performance with Precision and Endurance

Elevate your training and conquer your fitness goals with SIGMA, the benchmark for precision-engineered athletic technology. At traininn, we understand that dedicated athletes, from elite cyclists to passionate runners, demand reliability and accuracy from their gear. That´s why we proudly feature SIGMA, a brand synonymous with German innovation in the world of bike computers, GPS watches, heart rate monitors, and high-performance lighting. Every piece of SIGMA equipment is designed to be your trusted partner, capturing the vital data that fuels your progress and pushes you beyond your limits. Whether you´re navigating epic mountain trails, chasing a new personal best on the road, or analyzing your performance post-workout, SIGMA provides the clarity and insight you need to train smarter.

The true heart of this exceptional performance lies in the power that drives it. A SIGMA device is only as reliable as its power source, which is why our selection places a special emphasis on genuine SIGMA batteries and charging solutions. Don´t let a depleted battery cut your adventure short or compromise the integrity of your training data. We offer a comprehensive range of authentic SIGMA batteries, engineered specifically to meet the exact power demands of your equipment. From long-lasting rechargeable power packs for your ROX series GPS bike computer to specific replacement batteries for your heart rate sensors and wireless transmitters, we have the essential power solution to ensure you never miss a beat.

Choosing an original SIGMA battery means guaranteeing perfect compatibility, optimal runtime, and the safety of your valuable device. These power sources are designed to withstand the rigours of outdoor training, providing consistent and dependable energy through long endurance rides and intense interval sessions. Explore our collection of essential charging cables, USB-C connectors, and power banks designed to keep your SIGMA Aura and Buster series lights shining brightly, illuminating your path and ensuring your safety during dawn patrols and night-time excursions. By equipping yourself with authentic SIGMA power solutions from traininn, you´re investing in peace of mind. You can embark on every workout with the confidence that your gear is fully charged, ready to perform, and prepared to go the distance with you. Find the specific battery or charging accessory for your device and ensure your SIGMA technology is always ready for the next challenge

Have a question? We’ll help you right away.

You are interacting with a generative AI. By continuing, you accept the Legal Notice and confirm that you understand the Privacy Policy and Cookies Policy.

Have any questions?

Talk to an expert

+34 663 922 716

Sigma Batteries for fitness electronics

Sigma CR2032 3V Lithium battery

Sigma CR1025 Lithium battery

Find Electronics from Sigma for fitness