Wheelchair Battery Draining Too Fast? We'll Find the Drain

Shortening range is one of the most common complaints we hear about powered wheelchairs, and it is worth taking seriously — partly because of the inconvenience, and partly because it usually signals a component heading for failure. The good news is that rapid drain is diagnosable. This page explains what eats a charge, how we track it down, and what the likely fixes involve, in decision terms rather than pounds.

Why the range shrinks

The first and most ordinary cause is batteries simply ageing. Every recharge cycle takes a small toll, and after a few years a pack that once held a full day's charge holds only half of it. Ageing is not a fault — it is how batteries work — and the remedy is replacement, not regret. Batteries also decline faster if they are repeatedly left flat, charged only briefly, or stored somewhere cold and damp.

The second family of causes is hidden drains. A brake that has stopped releasing fully makes the motor work against friction all day. A wheel binding on a bent axle, debris round a caster, or under-inflated tyres all add load, and added load means added current. A charger that no longer charges fully leaves the pack starting each day part-full, which reads as drain even though the batteries are fine. Cold weather genuinely reduces capacity too, and a chair left outdoors overnight will never match its summer range.

The third family is electrical faults: chafed wiring, a controller drawing current when it should be asleep, or moisture in connections. These are less common but worth ruling out, and they are engineer work.

How we track the drain

We start with the history: how far the chair used to go, how far it goes now, how it is charged and stored, and when the decline began. A steady decline over years points to battery ageing; a sudden drop points to a specific fault. Then we test. Batteries get a load test, which reveals their true capacity — resting voltage flatters them shamelessly. The charger's output is measured to confirm it fills the pack completely. Wheels and casters are spun and inspected for friction, tyres checked for pressure, brakes checked for full release. Where nothing mechanical explains it, we examine wiring and the controller's behaviour.

Because the causes overlap, we may find two at once — tired batteries plus a dragging brake is a common pairing, and fixing only one leaves you disappointed. We report everything we find and quote for the whole remedy.

The fixes

Battery replacement is the bread-and-butter remedy, and we fit manufacturer-approved types — batteries are a normal consumable, not a failure of the chair. Charger replacement is quoted when the charger is proven weak. Brake and wheel work restores free rolling and often makes a visible difference to range on its own. Wiring faults are repaired properly, not patched. What we will not do is promise a specific mileage or hours of use afterwards, because range depends on terrain, user weight, temperature and usage, and making performance claims would be dishonest.

Small habits, big difference

Charge fully every night on a routine, in a dry place at a reasonable temperature, and let the charge complete. Do not leave the chair standing for weeks without charging. Keep tyres inflated, keep hair and debris off the axles, and listen for rubbing or scraping — added friction is stolen range. If the chair is stored in an unheated shed, expect winter range to be lower; that is physics, not fault.

Booking the visit

When you book, tell us the make, model and age of the chair, roughly what range it has lost, how it is charged and stored, and whether the decline was gradual or sudden. You pay a booking fee when you book, labour is hourly at a rate depending on how soon you need us, and the full cost of any work is quoted and approved before we begin, with parts such as batteries quoted separately.