Pods, lights & battery
Can I replace the battery?
Pods with a plug-in battery can be opened by hand and the battery swapped. The first prototype pods have a soldered battery, so email us instead.
Yes, on most pods. The battery plugs in with a small connector, so you can open the lid by hand and swap it with no tools.
Prototype pods: the first handful of prototype pods have the battery soldered to the board. Don't open those. Email hello@readmymove.com and we will swap the battery for you.
What you need
- A replacement battery: 3.7 V, 250 mAh, 30 × 20 × 5 mm, with a JST-PH 2-pin plug. Ask us for a matching spare.
- A fingernail or a coin to open the lid.
- Ideally a multimeter to check polarity.
Check polarity first
The red and black wires on batteries are not the same between suppliers. A battery plugged in back to front can destroy the board. Before you plug in a battery that didn't come from us, check with a multimeter that the contact meeting the pod's red wire reads +3.7 to +4.2 V. If it reads negative, don't use it.
Swap the battery
- Take the pod off its strap and unplug any cable.
- Put a fingernail or coin in the notch at the end opposite the USB-C port and lift the lid.
- Pull the connector out of its holder and unplug it. Hold the plastic housings, not the wires.
- Lift out the foam pad and the old battery.
- Put the new battery in the same way: wires at the end away from the USB-C port, foam pad on top.
- Plug in the connector and press it back into its holder.
- Close the lid and press both long sides until they click.
- Plug in USB-C to check that it charges.
Safety
- Never puncture, bend or crush the battery.
- If the lid won't close, don't force it. Check that the wires and foam sit flat.
- Recycle the old battery at a battery collection point, not in household waste.
Updated 1 November 2026.
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ReadMyMove shows how you move. It does not assess injuries or health. If you have pain, see a health professional. If you're pain-free, there's no need to change something just because it differs from a typical range.