No, Accessibility does not generally drain battery. However, some Accessibility features have the potential to use more battery power than others. To help conserve battery power, you can adjust the settings for individual accessibility features. For example, you can adjust the settings for TalkBack, the screen reader service, to reduce the amount of battery power it uses. Additionally, you can turn off certain features when not in use. Lastly, make sure your phone’s software is up-to-date to ensure any battery draining bugs are fixed.