Description
MK Battery / Deka® 8A31DT | 12 V 105 Ah AGM Deep-Cycle Solar Battery (Non-Spillable)
Overview
The Deka® 8A31DT is a Group 31, valve-regulated AGM (VRLA) deep-cycle battery engineered for renewable energy, marine/RV, and standby applications. With a rated capacity of 105 Ah @ C/20 (and 110 Ah @ C/100), its sealed, maintenance-free design delivers reliable power where non-spillable, indoor-safe operation is essential.
Domestic sourcing matters—here’s how this product qualifies:
Proudly Made in the USA
Every MK Battery / Deka® 8A31DT is built by East Penn Manufacturing Co. in Lyon Station, Pennsylvania—right here in the USA.
These batteries are crafted under one roof with decades of American engineering expertise, using a blend of U.S. and globally sourced materials to deliver unmatched reliability, consistency, and quality.
When you choose Deka®, you’re supporting American manufacturing and dependable power you can trust.
Key Features
- Sealed, maintenance-free AGM design — no watering; non-spillable for flexible mounting.
- 105 Ah @ C/20 deep-cycle performance; strong recovery from deep discharge.
- Rugged polypropylene case; forged terminals & bushings; lead-calcium plate alloy.
- Wide operating temperature range and low self-discharge for standby or intermittent use.
- Made in the USA by East Penn Manufacturing.
Applications
- Off-grid / hybrid solar battery banks and UPS standby power
- Marine & RV house banks; mobility and commercial equipment
- Telecom, SCADA, and remote monitoring systems
Technical Specifications
| Model | 8A31DT (AGM, Group 31) |
|---|---|
| Nominal Voltage | 12 V |
| Capacity | 110 Ah @ C/100 · 105 Ah @ C/20 · 86 Ah @ C/5 |
| Dimensions (L × W × H) | 12.93″ × 6.75″ × 9.38″ (329 × 171 × 238 mm) |
| Weight | ≈ 67.5–69 lb (≈ 31 kg) |
| Terminal Type | S/X dual terminal (SAE post + 5/16″ stud) |
| Plate Alloy | Lead-Calcium |
| Container / Cover | Polypropylene |
| Operating Temperature | –40 °F (–40 °C) to 140 °F (60 °C) |
| Charge Voltage @ 77 °F (25 °C) | Cycle: 13.8–14.6 V · Float: 13.4–13.6 V |
| Vent | Self-sealing (rated non-spillable by ICAO/IATA/DOT) |
| Country of Manufacture | USA (East Penn Manufacturing) |
Values shown are typical at 77 °F (25 °C).
Design & Performance
Absorbed-glass-mat separators fully immobilize the electrolyte, enabling spill-proof, vibration-resistant operation and excellent cycling durability. The 8A31DT’s dual-terminal layout simplifies integration across marine, RV, solar, and industrial systems, while precise charge-window control supports long service life.
