Remove the two screws from the back panel of M5 Dial

The orange clip can be stored safely as it will be replaced buy the battery adapter shortly.

The back of the M5 Dial with the orange back panel clip and its two screws removed, exposing the STAMP S3A board

Remove the STAMP S3A board

Insert an unpowered USB-C connector into the STAMP S3A board and carefully remove, ensuring you do not bend any pins.

Two photos side by side: a USB-C cable plugged into the STAMP S3A board on the back of the M5 Dial, then the cable being used to lift the board out of its socket, exposing the pins

Fit the battery clip into the M5 Dial

Take the battery clip and insert it into the M5 Dial. The polarisation should be correct, red aligned with the B+ marking on the board.

The battery clip’s red and black cable plugged into the connector inside the M5 Dial with the STAMP S3A board removed, leading out to the orange battery adapter

Refit the STAMP S3A board

The cable feeds out of the groove at the top of the STAMP S3A board. Feed the power cables through the adapter and reattach using the original screws from step 1.

The STAMP S3A board refitted in the M5 Dial, with the battery clip’s red and black cable running out of the groove at the top of the board to the orange battery adapter

IMPORTANT - DO NOT PLUG IN YOUR BATTERY

We need to confirm the polarity of the battery connector. Nearly all of these I’ve handled in the past have been incorrect.

A LiPo battery’s JST plug next to a pair of tweezers, with the red and black wires in the opposite positions to those on the battery clip

In the picture above you can see that the red cable on the battery clip does not match the polarity on the battery cable. If this is the case for your battery, read on. Otherwise you’re good to plug in.

Using thin pliers or a small screwdriver, gently pull up the thin plastic retainer on the battery JST plug, this will allow the cables to be removed. Ensure you don’t short the cables - LiPo batteries do not like this!

The battery’s JST plug with the black wire pulled out of its slot, next to a pair of tweezers

Reorientate the cables and push back into the JST plug one at a time. Again, don’t short the cables.

A LiPo battery with its red and black wires swapped back into the JST plug in the correct positions

You can now plug in the battery.