Battery Maintenance: Scooters & Wheelchairs

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MK Batteries are sold exclusively to DME suppliers. MK does not sell direct to consumers because the best sources for your batteries are the well-trained wheelchair technicians at your local dealer, such as Mobility123 | DSI. We understand your mobility equipment inside and out, know which batteries best fit your specific needs, and can most accurately determine when and if a battery replacement is necessary. For quality MK Battery products and peak performance, visit our showroom in Absecon, New Jersey.


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Battery Care & Maintenance Guide

This guide will help you maximize your battery’s performance for long-life, safety and peace of mind.

Storage & Maintenance

  • Always store your batteries FULLY CHARGED.
  • Check all stored batteries once a month and recharge as needed.
  • Fully charged Sealed Gel and AGM batteries can hold a charge for up to 6 months, however, they should always be charged before use.
  • When storing a power chair or scooter for more than 2 weeks, charge the batteries first and then disconnect them for storage.
  • Avoid hot and cold extremes when storing batteries.
Safety (Batteries Can Be Hazardous)
  • Dropping a tool or touching a watch or bracelet across the terminals can result in an electrical shock, sparks, smoke, fire and even an explosion. Use extreme caution around exposed battery terminals.
  • Battery Posts, terminals and related accessories contain lead and lead compounds, and other chemicals known to the state of California to cause cancer and birth defects or other reproductive harm. Was hands after handling.
  • BE CAREFUL! Batteries produce explosive gasses. Keep sparks, flames, and cigarettes away from batteries at all times. ALWAYS wear safety glasses and a face shield when working on or near batteries. Ventilate well. Do not install in an airtight container.
  • DO NOT ATTEMPT TO OPEN VENTS
  • All old batteries are considered “hazardous material” and must be recycled through an approved agency to prevent improper disposal. Lead-Acid batteries are virtually 100% recyclable. Be sure to return your used lead-acid batteries to a retailer. In most areas it is illegal to discard such a battery in the trash.
Battery Installation
  • Always have you batteries installed by a properly trained wheelchair or scooter technician. They have the necessary training and tools to do the job safely and correctly.
  • Wheelchairs and scooters typically require two batteries with a 24-volt series connection. Never mix and match different battery manufactures or technologies, or use the batteries that do not have similar date codes. NEVER mix gel batteries with AGM batteries.
  • Always fully charge batteries prior to use.
  • Follow installation and start-up instructions provided by the mobility equipment manufacturer.
Break-In Period
  • Active users of power wheelchairs cycle their batteries daily (deep cycling). This stringent application requires a unique battery design that will sometimes compromise initial capacity in return for the longer battery life. Gel battery performance improves once the battery has been cycled (discharged & recharged) 15-20 times. This break-in period is necessary to fully activate the battery for maximum performance and longevity. Thus, range and running time of your mobility device could initially increase with use.
When To Charge?
  • Charge batteries daily.
  • The charger supplied with your mobility device should fully charge your batteries overnight. Overcharging is not a problem with today’s smart chargers as they are voltage limited and shut off automatically. Sealed Gel and AGM batteries do not exceed a “use it or lose it” capacity robbing effect known as “memory”.
Proper Charging Guidelines
  • Use the equipment manufacturer’s automatic charger for all routine charging.
  • Never use an automotive or wet-type charger on Sealed Gel or AGM batteries as doing so will damage your batteries.
  • Depth of discharge affects cycle life. The harder a battery has to work, the shorter its life expectancy.
  • Avoid ultra-deep discharges and never drain your batteries completely.
  • Do not leave your batteries in a low state of charge for an extended length of time. Charge a discharged battery as soon as possible.
  • Do not cycle your batteries at a low state of charge without regularly recharging them fully.