Felicity Gel batteries are the more durable batteries amongst all deep cycle batteries because of the power and of the retaining power when its on load and the number of cycles it takes to run out, we are look at close to 2000 life cycles for this brand. Its a best buy bulk purchases are allowed. We also have 12v200ah gel batteries, 48v150ah lithium ion,48v250ah lithium ion,48v300ah kindly contact the numbers for more enquiries.