MK and Duracell The batteries have M6 Flat or post terminals and a cycle life of up to 680 cycles at 80% Depth of Discharge.
Sold individually $50 each or in pairs, couple years old and used in wheelchairs. I also have 47Ah Top Post MK gel. Not uncommon to get 10 years out of deep-cycle with proper care. Deep cell batteries can not be charged with a car charger. AGM and Gel also need different charge rates or they can be damaged. I will school you in proper battery care.
From the company;
Group24 60Ah GEL and hold a load for the specified duration. Lots of life left as long as you charge properly. I will school you on proper deep cycle charging to maximize the life. $350 each new. You can NOT use a standard car charger. MK are the only batteries wheelchair companies use in their equipment. Made in the USA.
When seeking the highest quality Deep Cycle batteries, look to MK Battery. MK Genuine Gel batteries have provided years of proven performance and significantly longer life - averaging 1 to 2 years or longer when properly maintained. That's why they have been the number one choice for years of the leading wheelchair manufacturers. When it comes to performance and quality, the MK Gel is the standard.
Genuine Gel Technology: In compliance with international standards that define Gel batteries, the electrolyte is completely immobilized in a highly viscous gelling agent in order to prevent spillage.
Increased Durability: MK Genuine Gel batteries can deliver 2 to 3 times the cycle life of AGM batteries in Complex Rehab Technology (CRT) and other high-demand, deep-cycle applications.
Gelled/Suspended Electrolyte: No liquid of any kind; battery is completely sealed. Safe in any position (except upside down).
Deep Cycle: Premium Sealed VRLA batteries capable of over 1000 cycles (50% DOD) as fully tested by independent laboratories.
Safety: MK Sealed VRLA batteries have a special re-sealing vent system that prevents excessive internal pressure, thus minimizing risk of explosion under normal conditions.
Electrolyte Will Not Stratify: No equalization charging required. Allows faster recharge.
10% More Electrolyte: Longer life and minimal dry out over extended use.
Less Than 2% Per Month Self-Discharge: Little deterioration during transport and storage.