Description
This is the Group 24 gel battery MK builds for large power chairs and scooters: East Penn part 8G24T881, model M24 SLD G, 73.6 Ah at the 20-hour rate.
Which power chairs and scooters take it?
Group 24 is the large power chair size. MK's own wheelchair chart sets two Group 24 batteries for chairs such as the Quantum 4Front 2 and Q6 Edge HD, and Pride lists a Group 24 pair as standard on the Pursuit XL. Check the group size and the terminal on your old battery before ordering; we match it for you.
A smaller case will not fit: U1 and 22NF chairs need those sizes instead, in our power chair batteries and scooter batteries.
What MK prints for it
The case measures 10.20 x 6.56 x 9.27 in (259 x 167 x 235 mm) and weighs 51.5 lb (23 kg). The terminal is MK's G code, a forged offset post with a 5/16 in stainless bolt and nut, and the hardware ships with the battery.
Plates are lead calcium in a polypropylene case, and MK rates the battery non-spillable by ICAO, IATA and DOT.
Gel, not AGM
Gel and AGM are both sealed, but they charge differently, so fit the chemistry your chair asks for and never mix the two. A new battery beside an old one shortens the life of both.
Charging, care and disposal
MK prints 13.8 to 14.6 V for cycle charging and 13.4 to 13.6 V float, both at 25 C, and warns that a new gel battery needs a few cycles before it reaches full range.
When the pair finally fails, bring it in: a sealed lead acid battery never goes in household garbage. Our technicians can fit and test a new pair through battery replacement or our service team.
Frequently asked questions
How many batteries does my chair need?
Most Group 24 chairs and scooters take two, wired for 24 V. The page price is for one battery.
Can I swap a gel battery into a chair that ran AGM?
Only if the chair's maker allows it. Sealed does not mean interchangeable: gel and AGM charge on different settings, so fit the chemistry your machine specifies.
My chair asks for a Group 22NF or U1. Does this fit?
No. Those are smaller cases. Ask us for the Group 22NF or U1 gel battery instead.
Can I fly with it?
MK rates it non-spillable by ICAO, IATA and DOT. The airline still makes the final call, so ask before you fly.
See the other batteries we stock, or read who may help pay. Mobility Specialties is an ADP registered vendor.
Specifications
- Product weight
- 51.5 lb (23 kg)
- Installation
- Our technicians fit and test a pair at your home or in our shop
- Disposal
- Never in household garbage; take a spent sealed lead acid battery to a battery take-back point
- Battery capacity
- 73.6 Ah at the 20-hour rate; 84.5 Ah at 100 hours, 63 Ah at 5 hours
- Battery voltage
- 12 V
- Battery group
- Group 24
- Battery terminal
- G (T881) forged offset post, 5/16 in stainless bolt and nut, hardware supplied
- Sold as
- One battery, terminal hardware included
- Air travel
- MK rates it non-spillable by ICAO, IATA and DOT and publishes a transport policy; the airline makes the final decision
- Battery length
- 10.20 in (259 mm)
- Battery width
- 6.56 in (167 mm)
- Battery height
- 9.27 in (235 mm) over the terminals
- Compatible with
- Group 24 power chairs and scooters, most of them taking two batteries; a smaller U1 or Group 22NF chair needs that size instead
- Plate alloy
- Lead calcium
- Container
- Polypropylene
- Charging
- 13.8 to 14.6 V cycle and 13.4 to 13.6 V float at 25 C (MK's figures); use the charger supplied with your chair
- Operating temperature
- -60 C to 60 C
- Made in
- United States, by East Penn Manufacturing
- Product type
- Gel battery for a power chair or scooter, Group 24
- Chemistry
- Valve-regulated gelled electrolyte (sealed lead acid)
Figures from the manufacturer. Options and seat sizes can change them; we confirm yours before ordering.
Documents
- Brochure MK 8G24 (M24 SLD G) gel battery data sheet, (c)2019
- User Manual MK 8A and 8G battery installation and operating instructions, E.P.M. Form 1833 8/25
- Other MK Genuine GEL battery brochure, LIT-GEL1002 02/20
- Other MK transportation policy for lead acid batteries used in power wheelchairs, 12 February 2025
- All forms and documents
Delivery and service
Delivery and setup
We deliver and set up equipment across Toronto and the GTA, and show you how everything works. Custom and special-order products can take longer; we confirm timing with you before delivery.
Service and repairs
Our technicians service what we sell, at home or in our shop.
Try before you buy
Visit a showroom in Etobicoke or Brampton to try products first, or book a free home assessment.
Warranty
Mobility store warranty terms
These are Mobility's purchase and service policy terms, separate from any manufacturer warranty coverage.
Lifetime on frame, 2 years on backs and cushions, 1 year on parts.
Read the warranty and service policy for the full terms.
Questions about this product?
Talk to our team, try it in a showroom, or book a free home assessment. We help with sizing and funding.
