Battery for Thymio

Quick Answer: Battery for Thymio is a replacement rechargeable battery pack for the Thymio educational robot. Schools fit a new Thymio battery when a robot’s original cell no longer lasts through a lesson or will not hold its charge.

When a Thymio Needs a New Battery

Thymio robots run on a built-in rechargeable lithium battery that is charged through the robot’s USB socket. Like any lithium cell, it slowly loses capacity with age and with the number of charging cycles, and a robot that once ran through a double lesson may start to stop within minutes. A replacement pack restores the working time without buying a new robot, which suits schools whose class sets were bought several years ago.

Before ordering, rule out the simpler causes: a worn USB cable, a charger that supplies too little current, or a robot that sat completely flat in a cupboard for months. If a robot still switches off early after a full charge on a cable and charger known to work, the battery is the likely cause.

Fitting the Thymio battery means opening the robot’s shell and plugging the new pack into the internal connector, so it is a job for a teacher or technician rather than pupils. Follow the robot maker’s guidance for opening the case, and note how the old pack sits before removing it.

Where a Replacement Battery Helps

• Reviving robots in an older class set that no longer last a full lesson
• Keeping a spare pack in the technician’s store so a robot with a failed cell is back in use quickly
• Restoring robots used in clubs or competitions, where long sessions drain batteries hardest

Specifications

Battery Care and Safety

• Charge Thymio robots at room temperature, on a hard surface away from paper or fabric, and not inside a closed cupboard.
• Before a long holiday, leave robots partly charged rather than empty, and top them up every few weeks if they are stored for a whole term.
• Do not use a pack that is swollen, dented or warm when idle; set it aside safely for recycling.
• Take spent lithium batteries to an electronics or battery collection point; never put them in general waste.

Why Choose LabEquip

Replacement batteries are usually ordered by the teacher or technician who maintains a school’s Thymio set, often a few at a time after an end-of-term check. LabEquip supplies them alongside the Robot Thymio II and the Thymio Loading Hub for charging several robots at once, within its General Lab Products range. Send the number of robots and their age through the contact page so the pack can be matched.

Frequently Asked Questions

How do I know the Thymio battery needs replacing?

If a robot switches off after a short time even though it was fully charged on a working cable and charger, the cell has lost capacity. A robot that will not switch on at all after charging may also have a battery fault.

Can pupils change the battery themselves?

It is better done by an adult. The robot has to be opened and the battery unplugged from an internal connector, and lithium packs must not be bent, pierced or short-circuited while being handled.

How is the new battery charged?

Once fitted, it charges inside the robot through the usual USB socket, from a computer port or a USB charger. Give the new pack a full charge before the first lesson.

Will this battery fit my Thymio robots?

Match the pack to your robot model and its battery connector. Send the robot version, or a photo of the old battery, and confirm the match at enquiry before ordering for a class set.

How long does a Thymio battery last on one charge?

Running time depends on how much each program uses the motors, LEDs and sound, and a lithium cell’s capacity falls gradually over its life. Regular charging and never storing the robot at zero charge help the pack keep its capacity longer.

How should old lithium batteries be disposed of?

Tape over the connector so the terminals cannot touch, then take the battery to a battery or electronics recycling point. Lithium batteries must not go into general waste or be burned.

Last Updated: September 2026