Quantum Q6 Edge 3.0 Battery Replacement Kit — Two 12V 55Ah Batteries

This kit replaces both batteries in your Quantum Q6 Edge 3.0 or Q6 Edge 2.0 power wheelchair: two matched 12V 55Ah sealed lead-acid batteries with nut-and-bolt terminals, backed by a one-year replacement warranty. They charge on the Quantum charger you already own — no adapters, no reprogramming.

Wheelchair batteries rarely quit all at once. Range fades first: the chair that used to handle a full day of errands starts needing a midday top-up, then struggles to finish a grocery run. That fade is cycle wear, and once one battery in the pair weakens, it drags the other down with it. A fresh matched pair restores the range the chair had when it was new.

Build features:

What this kit fits

Built as the replacement battery set for the Quantum Q6 Edge 3.0 and Q6 Edge 2.0 power wheelchairs. Same case size, same nut-and-bolt terminals, same fit in the battery compartment as the pair your chair came with, and your original charger handles the charging. Running the original Q6 Edge or a different Quantum model? Call 1-877-775-4381 and we’ll confirm the right kit before you order.

Why you replace both — and when you shouldn’t buy batteries at all

Your power wheelchair runs its two 12V batteries in series as one 24V system. Put one new battery next to one worn battery and the weak one sets the limit: the pair charges unevenly, the new battery works harder than it should, and you’re back shopping for batteries months early. That’s why this kit ships only as a matched pair.

And if your symptoms don’t sound like gradual range fade, hold off. A chair that dies suddenly, won’t take a charge at all, or lost power overnight may need a charger or a loose-connection check, not new batteries. Chargers fail more often than people expect. Call us and describe what the chair is doing — we’d rather tell you it’s your charger than sell you batteries you didn’t need.

About this kit

Each battery is 12V and 55Ah, sealed lead-acid with high-rate discharge plates. Sealed, non-spillable construction means no watering, no acid handling, and no maintenance beyond charging — safe to run indoors and in vehicle lifts.

Each battery measures 9.02 × 5.43 × 8.43 inches including terminals and weighs 31.97 lbs, about 64 lbs for the pair. The nut-and-bolt terminals take standard ring connectors, so the chair’s existing cables bolt straight on.

With nightly charging and daily use, plan on 12 to 18 months of service before range starts to fade again. Lighter use stretches that further; the care habits below are what get you to the long end of the range.

How to install it

Plan on 15 to 30 minutes with a wrench. If lifting 32 lbs per battery is a problem, this is a good job for a family member or your local mobility shop.

1. Power the chair off and unplug the charger before opening the battery compartment.
2. Photograph the cable routing, then disconnect and lift out the old batteries.
3. Set the new batteries in place, match red to positive and black to negative, and snug the nut-and-bolt terminals with a wrench. Loose terminals run hot; overtightening strips the bolt.
4. Close the compartment and give the pair a full overnight charge before the first ride. Most auto parts stores take the old batteries for recycling at no charge.

How to make it last

Two habits drive wheelchair battery life: charge every night, even after a short day, and don’t run the pair to empty before plugging in. Store and charge the chair somewhere between 50 and 80°F when you can, and if it sits unused, top up the charge every two weeks so the batteries don’t drain flat in storage. When replacement time comes around again, replace both together.

Frequently asked questions

Not sure this is the right kit for your chair? Call 1-877-775-4381 with your Quantum model and we’ll confirm the fit before you order — we’d rather check twice than ship you the wrong batteries.