• A fully charged wheelchair battery typically lasts 8 to 10 hours.
  • On a full charge, a wheelchair can cover approximately 10 to 15 miles, depending on terrain and the user’s weight.
  • The lifespan of an electric wheelchair battery is generally 18 to 24 months. It performs at peak capacity for about 1.5 years before it starts to degrade.

If you use an electric wheelchair, the battery you choose will dramatically impact your quality of life.

  • Recharging a wheelchair battery takes 8 to 14 hours. In other words, you’ll spend more time charging it than using it.
  • It determines how long and far you can go. What if you’re chasing the last bus, and the battery runs out?
  • Since a battery needs frequent replacement, it can put a real dent in your budget.

Clearly, you’ll want the most battery for the buck. This blog aims to help you make the best possible choice.

Wheelchair Batteries Vs. Car Batteries

  • Wheelchair batteries have a lower voltage and capacity than car batteries. They’re designed for a different scale of use.
  • Most wheelchair batteries are deep-cycle batteries that provide steady power over an extended period. Car batteries give a burst of energy to start the engine.
  • Wheelchair batteries are smaller and lighter than car batteries, which allows them to fit into a wheelchair’s compact frame.
  • Wheelchair batteries are built for more frequent charging cycles to meet the daily needs of electric wheelchair users.
  • Wheelchair batteries must be more resistant to shock and movement, while car batteries remain stationary within the engine compartment.

1. Longevity & Durability

Longevity should be at the forefront of your decision-making process.

  • A battery’s lifespan is measured in charge cycles — the number of times it can be fully charged and discharged before its capacity declines.
  • Look for batteries offering a high number of charge cycles, which indicates longer service life.
  • Batteries with more than 300 complete charge cycles are considered durable.

Durability is about maintaining effective performance over the battery’s lifespan. The battery should retain its charge and deliver steady power even after numerous recharges.

2. What’s the Warranty?

  • A good warranty hints at the manufacturer’s confidence in their product’s durability.
  • A warranty of one year or more is a sign that the battery is made to last.
  • Some manufacturers also offer prorated warranties, which cover a percentage of the cost if the battery fails within a specific timeframe.
  • Read the warranty terms and conditions to understand what’s covered and what isn’t.

3. Type of Battery

There are three main types of batteries for electric wheelchairs.

  • Sealed lead-acid (SLA) batteries are the most common, affordable and widely available. However, they require regular maintenance and can be heavy.
  • Absorbent glass mat (AGM) batteries are an upgraded version of SLA batteries that require less maintenance and have a longer lifespan. However, they’re more expensive.
  • Lithium-ion (Li-ion) batteries are the newest and most advanced type of battery, offering higher energy density and longer lifespan. They also have the highest price tag.

4. Size & Weight

All wheelchair batteries are designed to fit into a small frame, but there can be a considerable variance in size and weight.

  • The battery’s dimensions and weight can affect portability and maneuverability.
  • Some manufacturers offer lightweight options, which can make a sharp difference in overall wheelchair weight.
  • Heavier batteries may require additional accessories or modifications to support the added weight.

5. Voltage & Capacity

Voltage and capacity determine how long a battery will last on a single charge.

  • Wheelchair batteries typically come in 12-volt options, but higher-voltage options are available.
  • The higher the capacity (measured in ampere-hours or Ah), the longer the battery will last before recharging.
  • Consider your daily needs and use. A higher capacity will provide more range, but it will also make the battery heavier.

6. Charging Time

Charging time is crucial for convenience and usability. Consider models offering reasonable charge times and lifecycle.

  • Quick-charging batteries minimize downtime and enhance mobility.
  • Fast charging is particularly valuable for users with active lifestyles or those relying heavily on their wheelchairs.
  • Rapid charging speed shouldn’t compromise battery longevity, as faster charging can lead to quicker wear.
  • Investing in a dedicated fast charger designed for your battery model can significantly reduce charging times while maintaining battery health.

7. Compatibility

  • Verify compatibility with your wheelchair model. Not all batteries fit every wheelchair model.
  • Check your wheelchair’s user manual for recommended battery specifications.
  • Using an incompatible battery can waste money, damage your wheelchair, or lead to poor performance.
  • Ensure the battery’s voltage, size, and connector type match your wheelchair’s requirements.
  • Consider possible future upgrades or changes to your wheelchair.
  • Choose a battery compatible with multiple models or brands for flexibility.

8. Safety

  • Look for features like overcharge protection, short-circuit protection, and thermal regulation.
  • Overcharge protection prevents damage by stopping the charging once total capacity is reached.
  • Short-circuit protection prevents electrical mishaps that could harm you and the wheelchair.
  • Thermal regulation helps the battery maintain efficiency in extreme temperatures.

9. Maintenance

  • Low-maintenance or maintenance-free batteries require minimal care.
  • Sealed lead-acid (SLA) and lithium-ion batteries are popular maintenance-free options. They’re sealed and don’t need water refills.
  • Lithium-ion batteries are known for their long lifespan and efficiency.
  • These are practical choices for busy people or those with limited technical expertise.

10. Price & Value

Focus on the value of your investment rather than just the initial expense. A higher upfront cost may be justified if the battery delivers exceptional performance and durability.

  • Consider the overall cost of ownership, which includes warranties, maintenance, and replacement parts. A battery with an extended lifespan and minimal maintenance needs may offer better long-term value, even if its initial price is higher.
  • Be wary of offers that seem too good to be true. Rock-bottom prices might signal poor quality or a lack of essential features.
  • Opt for reputable brands and suppliers to ensure you purchase a dependable product.

11. Environmental Impact

  • Lithium-ion batteries have a longer lifespan and can be recharged many more times than traditional lead-acid batteries, producing less waste.
  • Lithium-ion batteries don’t contain harsh chemicals like sulfuric acid found in lead-acid batteries, making them safer to handle and dispose of.
  • Some manufacturers prioritize sustainability by implementing green production practices.
  • Research disposal options to ensure that your battery can be responsibly disposed of when it reaches the end of its life.

FAQs: Getting the Best Wheelchair Battery for Your Money

Q: Can lithium-ion batteries be recycled?

Lithium-ion batteries can and should be recycled to reduce waste and prevent the release of harmful chemicals into the environment. Many battery manufacturers offer recycling programs for their products, and companies like Powertron will buy your old battery when you purchase a new one.

Q: How do I know when to replace my wheelchair battery?

Most batteries will have a 2–3 years lifespan, but this can vary depending on use and maintenance. Signs that it may be time to replace your battery include decreased performance, difficulty holding a charge, and visible damage or corrosion.

Q: Can I use any type of charger for my lithium-ion battery?

Use a charger recommended by the manufacturer for optimal charging and to prevent potential damage to the battery. An incompatible charger could also void the battery’s warranty.

Q: What is the best way to store a lithium-ion wheelchair battery when unused?

Store it in a cool, dry place, ideally between 50°F and 77°F (10°C to 25°C). Before storage, charge it to around 50% to preserve its capacity and extend its lifespan.

Q: Do you have any tips for extending the lifespan of my lithium-ion battery?

  • Avoid completely discharging it before recharging.
  • Use the correct charger.
  • Keep the battery clean and free from dust and moisture.
  • Regularly check for signs of damage or wear.

Q: Can lithium-ion batteries be used in extreme temperatures?

Extreme heat can accelerate the degradation process, while freezing can reduce performance. Always refer to the manufacturer’s guidelines for temperature ranges.

Q: How can I ensure I am purchasing a quality lithium-ion wheelchair battery?

Look for reputable brands known for quality and reliability. Check for certifications and read user reviews. Purchasing from authorized dealers like Powertron can also ensure quality and warranty protection.

Q: Are there any safety concerns with lithium-ion batteries?

Avoid puncturing or crushing them, and keep them away from high heat or fire. They can become hazardous in such conditions and even explode. Follow all safety guidelines provided by the manufacturer to prevent accidents.