Price What Charging a Mobility Device Costs — Free, From Your Own Tariff
Charging a scooter or a power chair is a fixed, dated cost that people are often told to estimate as 'a few pounds a year'. On your own tariff and your own charging pattern it has a number, and a replacement charger can be judged against it.
The proof surface
Free path: the tool computes locally in this browser with no key and no account. Where an AI step helps, any free chat assistant works — free tiers exist (Google AI Studio, Groq), but plans and limits change, so check the provider's own page. No third-party service is claimed here as verified: UNCONFIRMED — model has no browsing access this session.
Why the flat version breaks
The charger label gives a maximum and the manual gives a range, neither of which matches how the device is actually used. Entering the charger's draw, the hours on charge and the rate from your bill produces a figure that can go into a budget line.
How to use the mobility charging ledger in four passes
The cost comes from what the charger draws from the wall. Battery capacity tells you how long the device runs, not what it costs to fill.
A charger that finishes in three hours and stays plugged in overnight draws for three hours. That difference is the largest single error in these estimates.
Overnight charging on an economy rate can be half the daytime rate. Use the rate for the hours you charge and record the basis on the ledger.
The replacement line uses identical hours and rate, so the difference is the hardware. Compare the payback with the warranty before buying a more efficient charger.
SAMPLE DATA, NOT A VERIFIED CLAIM: the starter record is a power chair charged six hours overnight on a 31-cent tariff, costing about 46 a year. Replace these values with your own source before you rely on anything.
What breaks first
Using the battery's rated watt-hours as the cost
Charging loses energy and the charger draws more than the battery stores. The wall reading, not the battery figure, is what the meter charges you for.
Assuming a cheaper charger saves money
Charger efficiency differences are small compared with the price of the unit. The comparison line exists to show when a replacement will never pay for itself.
Forgetting the standing charge exists
This figure is the cost of charging the device, not a reduction in your bill. The standing charge and the rest of your usage are separate.
What you pay otherwise
| The usual route | What it leaves out | Cost |
|---|---|---|
| A plug meter | One-off cost that pays for itself the first time it corrects an overnight assumption | $15–$30 once |
| An unmeasured charging estimate | A budget line built on a manual figure that does not match how you charge | the annual estimate |
| Replacing a working charger | Purchase price on a saving smaller than the warranty period it replaces | the charger price |
| This page + the free mobility charging ledger | Computed in your tab, result on screen before you type anything | $0 |
Try the free mobility charging ledger right here
Load the starter device and change the charging hours to 12 to see the annual figure climb.
FIRST-LOAD · sample record filed
Take it into the free mobility charging ledger
The companion app runs the same logic with a numbered intake, three starter records, a stateful share link, the one-time printable layer, and the local history shelf.
Open the free mobility charging ledger →Keep the work if you will use it again
The full ledger: daily, monthly and annual draw, the annual cost and the replacement comparison with payback, unlimited re-runs.
The on-screen result is free and complete. The one-time layer adds a tangible file you keep and the saved history that comes with it.
Boundary: This estimates a running cost from figures you enter; it is not an energy audit, a benefits assessment or a maintenance check on the device. Battery condition, charger safety and any equipment that connects to the mains are matters for the device's supplier or a competent person — never modify a charger or a battery yourself.