If you are looking to purchase a set of batteries for your mobility scooter or power wheelchair, you might find that there are some batteries classified as “GEL” and some that are standard AGM batteries (also referred to as standard sealed-lead-acid batteries).

SLA batteries are most commonly found in AGM form, which is what most mobility scooters, power wheelchairs, and even cars run on.

SLA batteries are available in AGM, or GEL options. GEL is typically going to be more expensive and they will last longer. They will not make your mobility scooter faster or increase the incline rating whatsoever. The only thing that you will notice is that they will last longer (if properly cared for).

With GEL batteries, a gelling agent is used to reduce any potential movement in the battery case. They typically also include a one-way valve instead of open vents which reduces gassing when the internal gasses recombine back into water. GEL batteries are also lead-acid-based chemistry.

With AGM SLA batteries, the case uses a glass mat to absorb the electrolyte in the case, which is why the name is Absorbed-Glass-Mat batteries. The chemistry is still the same as gel, which is lead-acid.

Standard SLA batteries will last about 2 to 2.5 years in a state like FL where it’s hot. You might get 3 years in cooler states, but the average lifespan of 12 Volt SLA batteries is about 2 years.

GEL-based SLA batteries are going to last a bit longer, around 3+ years, however, they don’t take the heat well. This is why we don’t recommend spending the extra money if you live in a warm climate state.