2032 Battery you need - https://amzn.to/3qk62lm

Here is a quick and simple little demonstration video on how to change out your dead / weak battery in your Holden Equinox / Astra key fob. The process doesn't require any tools. You only need a new 2032 coin cell battery. Remove the mechanical key but pressing the silver button on the side as I've shown. Once that is removed, use that to pry the two halves apart as well as removing the coin battery. Replace your dead battery with a fresh / fully charged once and clamp the two halves together. No need to reprogram! You're all set! I hope you found the video helpful. Take care!

Manufacturer GM / Holden
OEM Part Number 13511873/ 4EA
FCC ID HYQ4EA
Chip ID 46 HITAG2 7937
Frequency 433MHz ASK
Proximity / Smart Yes

Holden Equinox Prox/Smart Key (2016 - 2021) 2 Button / 3 Button / 4 Button
Holden Equinox EQ year 2017,2018,2019,2020
Holden Spark MP year 2016,2017,2018