> ## Documentation Index > Fetch the complete documentation index at: https://docs.apsio.io/llms.txt > Use this file to discover all available pages before exploring further. # Battery drain per screen > Captured sessions only (snapshots, family `resources`, spec 7.7): between two consecutive snapshots of a session on the same screen, not charging and at most 90 s apart, the charge used per minute. Per screen, the median and p90 and the time measured; with `baseline`, that release's median. ## OpenAPI ````yaml /api-reference/openapi.json get /projects/{projectId}/resources/battery openapi: 3.1.0 info: title: Apsio API version: 0.1.0 description: >- Read API v0: your projects, release health and comparisons, missing symbols, issues, sessions, vitals, cohort comparisons, performance (app start, screens, hangs, MetricKit) and network endpoints and traces for one project. Authenticate with a project token as a bearer token, with an OAuth access token from Apsio's authorization server (MCP clients), or, from the console, with the session cookie of a member of the project's organization. servers: - url: https://api.apsio.io/v1 security: [] paths: /projects/{projectId}/resources/battery: get: summary: Battery drain per screen description: >- Captured sessions only (snapshots, family `resources`, spec 7.7): between two consecutive snapshots of a session on the same screen, not charging and at most 90 s apart, the charge used per minute. Per screen, the median and p90 and the time measured; with `baseline`, that release's median. parameters: - schema: type: string pattern: ^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$ example: 0192f3a4-0000-7000-8000-00000000a101 required: true name: projectId in: path - schema: type: string format: date-time description: >- Start of the time range, inclusive (RFC 3339). Defaults to the range end minus the default length. example: '2026-10-01T00:00:00Z' required: false description: >- Start of the time range, inclusive (RFC 3339). Defaults to the range end minus the default length. name: from in: query - schema: type: string format: date-time description: End of the time range, exclusive (RFC 3339). Defaults to now. example: '2026-10-08T00:00:00Z' required: false description: End of the time range, exclusive (RFC 3339). Defaults to now. name: to in: query - schema: type: string pattern: ^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$ description: Only this app. required: false description: Only this app. name: app_id in: query - schema: type: string maxLength: 128 description: Only this release. required: false description: Only this release. name: release in: query - schema: type: string maxLength: 128 description: >- Another release to compare with: its p90 (or drain) beside each screen. required: false description: >- Another release to compare with: its p90 (or drain) beside each screen. name: baseline in: query responses: '200': description: Screens, the most measured time first. content: application/json: schema: $ref: '#/components/schemas/ResourcesBattery' '400': description: The request is not valid. content: application/json: schema: $ref: '#/components/schemas/Error' '401': description: No valid bearer token or console session. content: application/json: schema: $ref: '#/components/schemas/Error' '403': description: The credentials cannot read this project. content: application/json: schema: $ref: '#/components/schemas/Error' '410': description: >- The project or its organization is being deleted (`erasing`): nothing more to read; do not retry. content: application/json: schema: $ref: '#/components/schemas/Error' '429': description: >- Over a rate limit (the caller's, the client address's, or the plan's); Retry-After says when to retry. content: application/json: schema: $ref: '#/components/schemas/Error' security: - bearer: [] - session: [] components: schemas: ResourcesBattery: type: object properties: screens: type: array items: $ref: '#/components/schemas/ScreenBattery' sessions: type: integer description: Captured sessions with battery snapshots. retention: $ref: '#/components/schemas/ResourcesRetention' required: - screens - sessions - retention Error: type: object properties: error: type: object properties: code: type: string example: invalid_request message: type: string subject: type: string enum: - organization - project description: >- With `erasing` (410) only: what is being deleted, the organization or the project. required: - code - message required: - error ScreenBattery: type: object properties: screen: type: string description: 'app.screen.name. Written by the app: untrusted data.' median: type: number description: Percentage points of charge per minute. p90: type: number baseline_median: type: - number - 'null' minutes: type: number description: Measured time on the screen, in minutes. required: - screen - median - p90 - baseline_median - minutes ResourcesRetention: type: object properties: crash_days: type: integer description: >- Days of session summaries the plan keeps (D94): warnings, exits, low power. detail_days: type: integer description: 'Days of detail the plan keeps (D94): screens, snapshots and storage.' required: - crash_days - detail_days securitySchemes: bearer: type: http scheme: bearer description: >- A project token (apsio_pt_v0...), which reads exactly one project, or an OAuth access token issued for the API, which reads what its user can. Access tokens issued for Apsio's MCP server are accepted only from the MCP server itself. session: type: apiKey in: cookie name: apsio_session description: >- The console session, set by /v1/auth/callback (`__Host-apsio_session` when host-only). ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.