Trojan 31-AGM 12V, 100AH (20HR) AGM Sealed Battery

Trojan 31-AGM 12V, 100AH (20HR) AGM Sealed Battery
Trojan 31-AGM 12V, 100AH (20HR) AGM Sealed Battery
$313.43 List price $332.24
  Customer Reviews (1)

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Item code Brand name Model number Volts Amp Hours
TRO31-AGM Trojan Batteries 31-AGM 12V 100A-H
Please Note: All of our Trojan batteries are shipped directly, fresh from the Trojan factory to ensure the longest lifetime and minimize their self-discharging.

Trojan will only drop ship batteries within the lower 48 states and Canada. Shipments to HI or AK will need to be consolidated in our warehouse prior to shipping.
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Trojan Battery Company Trojan 31-AGM Battery

Trojan Battery Company
12V, 100AH Deep Cycle AGM Battery

Trojan’s deep-cycle absorbed glass mat (AGM) maintenance-free batteries feature a number of design elements to provide optimum performance. Robust plates extend the life-cycle of Trojan’s deep-cycle AGM batteries and a separator of glass fibers serves to isolate the positive and negative plates while acting as a blotter to absorb the electrolyte. The separator is maintained under compression between plates to assure contact with plate surfaces. A computer-generated grid design is optimized for high-power density and the battery’s flame arresting, one-way pressure relief vent prevents buildup of excessive pressure. Trojan’s deep-cycle AGM batteries are low temperature tolerant, shock and vibration resistant and have a low internal resistance for higher discharge current and higher charging efficiency.

Product Specifications

BCI Group Size Type Capacity Amp-Hours
(20-Hr Rate)
Voltage Length Width Height Weight
31 31-AGM 100 AH 12V 13.4375" 6.8125" 8.1875" 69 lbs.

AGM Battery Cycle Life

The most important characteristic to consider when purchasing a deep-cycle battery for a renewable energy application is cycle life. This is usually measured as the number of discharge/charge cycles the battery can provide before its capacity drops to a specified percentage of its rated capacity (i.e. 50%). Batteries from different manufacturers may have the same capacity and energy content and be similar in weight, but design, materials, process, experience and quality control have a big influence on how long the battery will cycle. When comparing two batteries of equal Ah capacity and cost, a battery capable of 1,000 cycles is effectively half the total life cost of one that is only capable of 500 cycles.

Terminal Configurations

Automotive Post & Stud Terminal Automotive Post & Stud Terminal Polyon Case
Terminal Height Inches (mm)
29/32 (20)
Torque Values in-lb (Nm)
Bolt: 95 – 105 (11 – 12)
AP: 50 – 70 (6 – 8)
Bolt Size
5/16 – 18 * Polyon Case

Trojan Battery Company

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Solid and Reliable


Purchased three of these last winter. Hooked them up in parallel. They power my workshop which i only use on the weekends. I watch the discharge rate and never let them drop below 60%. I recharge them thru the week with a single 100 watt panel. They keep there charge very well and arent so huge ...
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