Description
The Trojan 31-AES is a 12-volt, 104 Ah agm (trojan aes) battery for trolling-motor runtime and house loads such as electronics, lighting and pumps. It weighs about 69 lb, so plan for a secure, vented battery box and a solid hold-down. The case follows a BCI 31 footprint; confirm your tray size and terminal orientation before you buy. Reserve capacity is 180 minutes at a 25 A draw. The sealed AGM design is maintenance-free and spill-resistant.
Highlights
- 12 V, 104 Ah AGM (Trojan AES)
- BCI 31 footprint
- 69 lb
- Best for: Trolling Motor, House Bank
Specifications
| Brand | Trojan |
|---|---|
| Model / SKU | 31-AES |
| Nominal voltage | 12 V |
| Capacity | 104 Ah (20-hr rate) |
| Chemistry | AGM (Trojan AES) |
| Reserve capacity | 180 min @ 25 A |
| BCI group size | 31 |
| Dimensions (L × W × H) | 12.8 × 6.81 × 9.43 in |
| Weight | 69 lb |
| Reserve minutes | @25 Amps / 180 |
| Energy | 1.38 kWh (20-hr) |
| Operating temperature | -40°F to 140°F (-40°C to 60°C) |
| Terminal options | Automotive Post & Stud Terminal DT, M8 Insert |
Specs are from the manufacturer. Check your boat’s battery compartment, terminal layout and charging system before you order.






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