Unfortunately, there’s no outright way to increase the battery life on the controllers since there’s no type of use for them that you can alter within the VR experience, and they rely on external batteries rather than an in-built lithium-ion. This means that the only way to increase battery life is to do one of the following: Buy a battery with better capacity, such as a Duracell AA set; or buy an external rechargeable AA battery set with longer battery life, ideally over 1200 mAh; or lastly, buy a charging dock that comes equipped with better rechargeable batteries. While these alternatives won’t increase your battery per se, they’ll ensure that the better batter and charging management that you have is more suited to a convenient VR experience with the Oculus Quest 2 Touch Controllers.