MK Battery M40-12 SLD G · 40Ah 12V · for powerchairs and mobility scooters

Summary: Quick facts on the MK Battery M40-12 SLD G: intended for mobility scooters and wheelchairs, rated 40Ah 12V. Owners usually check three things first: size, terminal side and starting power.

MK Battery M40-12 SLD G: dimensions and ratings

Installation and maintenance tips

Powerchairs used from morning to night cycle their batteries hard every day. Use the charger supplied with the chair or one set for the gel chemistry. Batteries left flat in storage often never recover.

Batteries with the same format

Same format, different makers: these alternatives match the MK Battery M40-12 SLD G in size and layout.

Deka 8G40MK Battery 8G40

About the MK Battery M40-12 SLD G

Powerchair or scooter needing a MK Battery M40-12 SLD G? Read on. Mobility batteries are judged on capacity, size and terminal type. Searching by exact code is the surest route to a matched pair.

Most batteries for mobility scooters and wheelchairs land close to 40Ah, and this one does too.

Common questions about the MK Battery M40-12 SLD G

Quick compatibility checklist

• ✓ Built with gel technology: if your vehicle or system was set up for another chemistry, check the charging settings first.
• ✓ Tape measure time: 197.1 × 168.1 × 174.8 mm is the footprint and height of this case. Leave a little clearance for the clamp and the cable lugs.
• ✓ Rated 40Ah: check that the charger or alternator in your system can refill a battery of that capacity in reasonable time.

Explore more

Everything you need to order the MK Battery M40-12 SLD G is on this page. Not quite the right size? Have a look at other batteries for mobility scooters and wheelchairs.

• More for mobility scooters and wheelchairs
• The complete MK Battery range

gel: how it works

Thickened electrolyte keeps the acid evenly spread through the cell. Gel copes with high ambient temperatures better than many types. Recharge a gel battery soon after each discharge rather than leaving it empty.