# Scooter charging calculator - Human page: https://happytails.ai/en/calculators/scooter-charging-calculator/ - Markdown: https://happytails.ai/en/calculators/scooter-charging-calculator.md - Structured JSON: https://happytails.ai/agents/en/calculators/scooter-charging-calculator/index.json - Visibility: public ## Tool capabilities | Property | Value | | --- | --- | | Tool ID | `scooter-charging-calculator` | | Category | calculators | | Implementation | Registered implementation. Registration alone is not a production-quality guarantee. | | Browser execution | Use the visible action or interactive controls. | | Browser processing | Browser; see tool notes for network behavior. | | HTTP API | Not callable through HTTP. | | Browser-agent interface | run_current_tool | ### Implementation notes Energy is nominal battery V × Ah; starting and target charge must be from 0 to 100%, with target at least the starting value. Ideal duration uses charger DC output V × A; charger output voltage must be 0.001 to 1000 V and current 0.001 to 10000 A. Efficiency changes grid energy and cost only; duration multiplier changes time only. Electricity price is 0 to 10000 per kWh. This is a constant-rating estimate, not a measured charging curve. It does not establish charger compatibility, battery health, safe charge limits or actual completion time. Runs locally without uploads. Limit: 500000 combined input characters, 2000 records, 30 tariffs or grades, 30 tiers per tariff and 100 depreciation years. Complete JSON and JSON Pointer CSV exports are each capped at 2000000 characters and CSV at 200000 leaf records. Preview shows 200 report rows. Calculations stop after 10 seconds. Copy result copies the report text; downloads include source inputs, units, assumptions and complete results. ### Inputs and settings No free-text input is required. Use the file inputs and/or settings below. | Setting | Meaning | Control type | Default | Constraints | | --- | --- | --- | --- | --- | | `batteryVoltageV` | Nominal battery voltage (V) | text | "36" | | | `capacityAh` | Battery capacity (Ah) | text | "10" | | | `startPercent` | Starting charge (%) | text | "20" | | | `targetPercent` | Target charge (%) | text | "80" | | | `chargerOutputVoltageV` | Charger DC output voltage (V) | text | "42" | | | `chargerOutputCurrentA` | Charger DC output current (A) | text | "2" | | | `wallToBatteryEfficiencyPercent` | Wall-to-battery efficiency (%) | text | "80" | | | `durationMultiplier` | Charging duration multiplier | text | "1.5" | | | `pricePerKwh` | Electricity price per kWh | text | "0.3" | | | `currency` | Currency label | text | "EUR" | | ### Browser-agent workflow 1. Open the human page in a browser that supports WebMCP. 2. Discover the interface exposed by that page; use its actual schema. 3. Select files on the page first when the tool requires files. 4. Call `run_current_tool` with valid input and settings. 5. Inspect the returned result or error and the displayed output. Retrieve files from the displayed download links. Calls do not automatically copy or download results. Browser permissions still apply. Interface availability alone is not proof of successful execution. ### Planning specification Energy is nominal battery V × Ah; starting and target charge must be from 0 to 100%, with target at least the starting value. Ideal duration uses charger DC output V × A; charger output voltage must be 0.001 to 1000 V and current 0.001 to 10000 A. Efficiency changes grid energy and cost only; duration multiplier changes time only. Electricity price is 0 to 10000 per kWh. This is a constant-rating estimate, not a measured charging curve. It does not establish charger compatibility, battery health, safe charge limits or actual completion time. Processing stays on your device in a cancellable worker with a 10-second timeout. Maximum 500000 combined input characters and 2000 records, with 30 tariffs or grades, 30 tiers per tariff and 100 depreciation years. Guided decimals allow up to six places without thousands separators. Full JSON and JSON Pointer CSV include all source inputs, units, assumptions and results; each file is capped at 2000000 characters and CSV at 200000 leaf records. All tariff totals precede the first 200 detail rows in the parking preview; other tables preview 200 rows. Software bounds are not vehicle capability claims. Results use floating-point arithmetic. This describes intended requirements. Use the implementation notes, interface schema and observed output to determine current support. ### Complete machine-readable capability record ```json { "id": "scooter-charging-calculator", "category": "calculators", "built": true, "requirements": "Energy is nominal battery V × Ah; starting and target charge must be from 0 to 100%, with target at least the starting value. Ideal duration uses charger DC output V × A; charger output voltage must be 0.001 to 1000 V and current 0.001 to 10000 A. Efficiency changes grid energy and cost only; duration multiplier changes time only. Electricity price is 0 to 10000 per kWh. This is a constant-rating estimate, not a measured charging curve. It does not establish charger compatibility, battery health, safe charge limits or actual completion time. Processing stays on your device in a cancellable worker with a 10-second timeout. Maximum 500000 combined input characters and 2000 records, with 30 tariffs or grades, 30 tiers per tariff and 100 depreciation years. Guided decimals allow up to six places without thousands separators. Full JSON and JSON Pointer CSV include all source inputs, units, assumptions and results; each file is capped at 2000000 characters and CSV at 200000 leaf records. All tariff totals precede the first 200 detail rows in the parking preview; other tables preview 200 rows. Software bounds are not vehicle capability claims. Results use floating-point arithmetic.", "implementation": { "fields": [ { "key": "batteryVoltageV", "label": "Nominal battery voltage (V)", "value": "36", "type": "text", "inputMode": "decimal", "maxLength": 24, "help": "Use the nominal voltage on the battery label, not the charger voltage. Range: 0.001 to 1000 V." }, { "key": "capacityAh", "label": "Battery capacity (Ah)", "value": "10", "type": "text", "inputMode": "decimal", "maxLength": 24, "help": "Battery label amp-hours, from 0.001 to 10000 Ah." }, { "key": "startPercent", "label": "Starting charge (%)", "value": "20", "type": "text", "inputMode": "decimal", "maxLength": 24, "help": "Use a decimal point, up to six decimal places and no thousands separators." }, { "key": "targetPercent", "label": "Target charge (%)", "value": "80", "type": "text", "inputMode": "decimal", "maxLength": 24, "help": "Use a decimal point, up to six decimal places and no thousands separators." }, { "key": "chargerOutputVoltageV", "label": "Charger DC output voltage (V)", "value": "42", "type": "text", "inputMode": "decimal", "maxLength": 24, "help": "Use a decimal point, up to six decimal places and no thousands separators." }, { "key": "chargerOutputCurrentA", "label": "Charger DC output current (A)", "value": "2", "type": "text", "inputMode": "decimal", "maxLength": 24, "help": "Use a decimal point, up to six decimal places and no thousands separators." }, { "key": "wallToBatteryEfficiencyPercent", "label": "Wall-to-battery efficiency (%)", "value": "80", "type": "text", "inputMode": "decimal", "maxLength": 24, "help": "Enter your assumption, greater than 0 and at most 100. No default efficiency is measured or looked up." }, { "key": "durationMultiplier", "label": "Charging duration multiplier", "value": "1.5", "type": "text", "inputMode": "decimal", "maxLength": 24, "help": "Enter 1 to 100. A value of 1 assumes constant rated DC output; a larger value allows for taper and delays." }, { "key": "pricePerKwh", "label": "Electricity price per kWh", "value": "0.3", "type": "text", "inputMode": "decimal", "maxLength": 24, "help": "Use a decimal point, up to six decimal places and no thousands separators." }, { "key": "currency", "label": "Currency label", "value": "EUR", "type": "text", "maxLength": 3, "help": "Three uppercase letters. All entered prices use this currency." } ], "input": false, "presentation": "metrics", "note": "Energy is nominal battery V × Ah; starting and target charge must be from 0 to 100%, with target at least the starting value. Ideal duration uses charger DC output V × A; charger output voltage must be 0.001 to 1000 V and current 0.001 to 10000 A. Efficiency changes grid energy and cost only; duration multiplier changes time only. Electricity price is 0 to 10000 per kWh. This is a constant-rating estimate, not a measured charging curve. It does not establish charger compatibility, battery health, safe charge limits or actual completion time. Runs locally without uploads. Limit: 500000 combined input characters, 2000 records, 30 tariffs or grades, 30 tiers per tariff and 100 depreciation years. Complete JSON and JSON Pointer CSV exports are each capped at 2000000 characters and CSV at 200000 leaf records. Preview shows 200 report rows. Calculations stop after 10 seconds. Copy result copies the report text; downloads include source inputs, units, assumptions and complete results.", "inputMaxLength": 500000, "inputErrorCode": "VEHICLE_INPUT", "example": { "input": "", "options": { "batteryVoltageV": "36", "capacityAh": "10", "startPercent": "20", "targetPercent": "80", "chargerOutputVoltageV": "42", "chargerOutputCurrentA": "2", "wallToBatteryEfficiencyPercent": "80", "durationMultiplier": "1.5", "pricePerKwh": "0.3", "currency": "EUR" } }, "experience": { "automatic": false, "single": false, "inputMaxLength": 500000, "inputMode": "text", "label": "Your text", "placeholder": "Type or paste your input…", "help": "Up to 500,000 characters. Review the settings before running.", "action": null }, "mode": "explicit", "interactive": false }, "execution": "Browser interface", "api": null, "browser_agent": { "supported": true, "name": "run_current_tool", "discovery": "WebMCP on the human page in a supporting browser", "verification": "See audit/API-AUDIT.md; availability is not verification" } } ``` ## Page guide Estimate scooter charging duration and electricity cost from battery and charger ratings. How can we improve this tool? Report a problem or share an idea. Please leave out private information. Your message and the tool name go to our team via PostHog. ### How to use Scooter charging calculator 1. Enter nominal battery voltage and amp-hour capacity, then your starting and target charge. 2. Enter charger DC output ratings, your efficiency and duration assumptions, and electricity price. 3. Review modeled energy, duration and cost. Download the full report with all assumptions. ## Useful next steps - [Parking cost calculator](https://happytails.ai/en/calculators/parking-cost-calculator/) ([Markdown](https://happytails.ai/en/calculators/parking-cost-calculator.md)) - [Fuel grade cost comparison](https://happytails.ai/en/calculators/fuel-grade-cost-comparison/) ([Markdown](https://happytails.ai/en/calculators/fuel-grade-cost-comparison.md)) - [Vehicle depreciation calculator](https://happytails.ai/en/calculators/vehicle-depreciation-calculator/) ([Markdown](https://happytails.ai/en/calculators/vehicle-depreciation-calculator.md)) ## Use battery and charger ratings separately Battery energy in kWh equals nominal battery volts times amp-hours divided by 1000. Charger DC output power equals output volts times output amps. The battery nominal voltage and charger output voltage are different inputs. ### Make charging assumptions explicit Ideal hours equal the requested stored energy divided by charger DC power. The entered duration multiplier allows for taper or delays. Wall-to-battery efficiency affects grid energy and electricity cost, not ideal DC charging duration. These assumptions do not verify charger compatibility or predict a measured completion time.