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DEEP CYCLE GEL 60Ah BATTERIES MARINE/RV/Car Stereo - $50 (Milwaukee)
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Sold individually $50 each or in pairs, a couple years old and used in wheelchairs. I have only one 80ah Duracel AGM @65. I also have four 47Ah MK gel. Good batteries, I will Internal Resistance test them for you. I have many others but they are 45-60Ah.
Not uncommon to get 10 years out of deep-cycle with proper care. The batteries have a cycle life of up to 680 cycles at 80% Depth of Discharge. Deep cell can not be charged with a car charger. AGM and Gel also need different charge rates or they can be damaged. You can NOT use a standard car charger. MK are the only batteries wheelchair companies use in their equipment. Made in the USA. 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. Made in the USA..
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.
Less Than 2% Per Month Self-Discharge: Little deterioration during transport and storage.