MK Battery

MK Battery M40-12 SLD M · Electric wheelchair battery 12V 45Ah

Reference: BOL-MK-M40-12 SLD M · EAN 8404653009069

MK Battery M40-12 SLD M: electric wheelchair battery with 12 V and 45 Ah, measuring 198.1 × 166.1 × 170.9 mm.

Who the MK Battery M40-12 SLD M is for

The MK Battery M40-12 SLD M is a deep-cycle battery for electric wheelchairs: sealed, maintenance-free and built to discharge and recharge every day without losing capacity. With 45 Ah per battery, the M40-12 SLD M is designed for a full charge every night.

The M40-12 SLD M belongs to the MK Battery MK AGM range. More MK Battery batteries

Equivalents and alternatives to the MK Battery M40-12 SLD M

As the M40-12 SLD M is an AGM battery, we only list other AGM batteries with its dimensions and polarity: neither an EFB nor a conventional battery can replace it.

ModelTechnologyCapacityDimensions (mm)
Kronobat ES45-12AGM45 Ah198 × 166 × 171
Long WP45-12AGM45 Ah199 × 166 × 171
Long WP45-12NAGM45 Ah199 × 166 × 171
Long WP45-12NEAGM45 Ah199 × 166 × 171
Fullriver HC44AGM44 Ah198 × 166 × 170
Ritar RA12-40BAGM42 Ah198 × 166 × 171

MK Battery M40-12 SLD M vs ES50-12 and M50-12 SLD M: which one to choose?

The real differences between the M40-12 SLD M and the closest MK Battery models:

ModelCapacityDimensions (mm)Weight
MK Battery M40-12 SLD M (this one)45 Ah198.1 × 166.1 × 170.914.47 kg
MK Battery ES50-1250 Ah198.9 × 166.1 × 170.915.06 kg
MK Battery M50-12 SLD M50 Ah198.9 × 166.1 × 170.915.06 kg
  • MK Battery ES50-12: 5 Ah more, the same dimensions.
  • MK Battery M50-12 SLD M: 5 Ah more, the same dimensions.

AGM technology in the M40-12 SLD M

The M40-12 SLD M is AGM: the electrolyte is absorbed in glass fibre mats, so it is sealed and spill-proof. Being sealed, the M40-12 SLD M can be fitted in the boot or under a seat with no risk of spills.

Before ordering the M40-12 SLD M, check this

  • The M40-12 SLD M needs 198.1 × 166.1 × 170.9 mm of space: measure it with the hold-down clamp in place.
  • With 45 Ah, the M40-12 SLD M replaces an original battery of that capacity or slightly less.

MK Battery M40-12 SLD M codes and part numbers

Look for any of these M40-12 SLD M codes on your current battery or in the manufacturer's catalogue:

Commercial referenceM40-12 SLD M
EAN8404653009069
Not to be confused withMK Battery M20-12 SLD M (20 Ah), MK Battery M40-12 SLD G (40 Ah), MK Battery M45-12 SLD M (45 Ah)

Frequently asked questions about the MK Battery M40-12 SLD M

MK Battery M40-12 SLD M or ES50-12?

Compared with the M40-12 SLD M, the MK Battery ES50-12 has 5 Ah more. With 50 Ah, the ES50-12 runs longer between charges than the M40-12 SLD M (45 Ah). Both measure 198.1 × 166.1 × 170.9 mm, so they fit the same tray.

How much does the MK Battery M40-12 SLD M weigh?

The M40-12 SLD M weighs 14.47 kg. For reference, the MK Battery ES50-12 (50 Ah) weighs 15.06 kg.

Which battery is equivalent to the MK Battery M40-12 SLD M?

Only other AGM batteries with its dimensions and polarity: Kronobat ES45-12, Long WP45-12 and Long WP45-12N. Neither an EFB nor a conventional battery replaces the M40-12 SLD M.

How much range does the MK Battery M40-12 SLD M give in an electric wheelchair?

It depends on weight, terrain and the chair. As a guide, with 45 Ah per battery an average chair covers several kilometres a day; range drops with hills and cold batteries.

Other options if you are unsure about the M40-12 SLD M

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