# Charging Widget V0 Template: The Playbook for Animated Battery UIs - Tool: V0 Templates - Last updated: July 2026 ## TL;DR The Charging Widget is a V0 template built with Next.js, Framer Motion, and inline SVG. It renders an animated battery indicator that transitions fill colour by charge level (red, yellow, green), shows a lightning bolt when charging, and displays a live percentage label. The prompt pack covers simulated charging loops, WebSocket live data, Supabase real-time subscriptions, and multi-device fleet dashboards. ## Frequently asked questions ### Is the Charging Widget template free to use? Yes — all V0 community templates are free to fork. You need a free V0 account, but there is no charge for the template itself. Deploying to Vercel on the Hobby plan is also free for personal or side projects. ### Can I use this template commercially, for example in a paid IoT dashboard product? Yes. V0 community template output is yours once forked, with no licensing restrictions on the generated code. The underlying libraries — Framer Motion (MIT), Tailwind CSS (MIT), Next.js (MIT) — all permit commercial use. You are free to ship this as part of a paid product. ### Why does my fork break in the V0 preview when I try to change the fill colour? The most common cause is applying Tailwind bg-* classes to SVG elements. SVG rects require fill-* Tailwind utilities (e.g., fill-green-500) or an inline fill attribute — background-color has no effect on SVG. Prompt V0 to 'replace all bg-* classes on SVG elements in BatteryShell and ChargeLevelFill with fill-* utilities' and the colours will apply correctly. ### How do I connect the widget to real battery data? There are two paths: for browser-based real-time data use the WebSocket prompt from the prompt pack, which wires `{ level, charging }` messages to the ChargingWidget props. For a database-backed approach, use the Supabase real-time subscription prompt to subscribe to postgres_changes on a device_status table. Both prompts are in the prompt pack above with copy-paste instructions. ### Does the template support multiple devices on the same screen? The template ships as a single-device widget. To display multiple devices, use the 'multi-device fleet view' advanced prompt from the pack, which wraps ChargingWidget in a DeviceGrid that fetches all rows from a Supabase device_status table and renders one widget per device. For more than a handful of devices, a custom implementation with server-side pagination is recommended. ### Why does the ChargeLevelFill snap to the final value instead of animating when I pass a level from a fetch? Framer Motion needs an explicit initial value to animate from. When the level arrives asynchronously (after the first render), Framer Motion has nothing to transition from and jumps directly to the target. Fix: add `initial={{ width: '0%' }}` to the ChargeLevelFill motion component so it always starts from empty and animates up to the fetched level. ### Can RapidDev extend this template for a production IoT dashboard? Yes — RapidDev builds production IoT dashboards from V0 prototypes like this one, adding Supabase real-time subscriptions, multi-device fleet views, low-battery alert notifications, and historical charge charting. Reach out at rapidevelopers.com if your use case has grown beyond a single-device display. ### Will the WebSocket approach work when deployed to Vercel? The ChargingWidget itself (the client component) will connect to WebSocket fine from Vercel — it runs entirely in the browser. Your WebSocket server (ws://localhost:8080 in the prompt) must be hosted separately, for example on a Fly.io or Railway instance, since Vercel serverless functions do not maintain persistent WebSocket connections. Update the WebSocket URL to your hosted server URL in the Vars panel after deployment. --- Source: https://www.rapidevelopers.com/v0-template/charging-widget © RapidDev — https://www.rapidevelopers.com/v0-template/charging-widget