TM29 Premium Group 31 | TM29 Deep Cycle Marine Battery | 110AH Power your passion with the ultimate heavy-duty marine battery. The Group 31 (TM29) is the largest of the standard marine sizes, engineered specifically for high-demand applications. Whether you are running a multi-day fishing tournament, a large trolling motor, or an extensive marine electronics suite, this battery delivers the massive 110AH capacity and 190-minute reserve you need to stay out longer. Designed as a Maintenance-Free Wet Cell, it combines the heavy-duty cycling capabilities of a deep-cycle battery with enough "kick" (900 Cranking Amps) to reliably start most large marine engines. Common Replacement For: This battery is a direct performance replacement for high-capacity Group 31 and TM29 batteries, including: Interstate Batteries: SRM-31, 31M-EHD, 31-MHD Deka / East Penn: 31M7, DC31DT, Marine Master 31 EverStart (Walmart): 31MS, Maxx Marine Group 31 Duracell (Batteries Plus): SLI31MDC, 31DTMAGM (Flooded equivalent) Exide / Nautilus: NC-31, E31MDP Duralast (AutoZone): 31-DL, 31M-AGM NAPA: 8231, 8302 Super Start (O'Reilly): 31MS, 31DCM ACDelco: M31MF, Voyager M31 Performance Specifications Model/Reference: Group M31 / TM29 Voltage: 12V Capacity: 110AH (Amp Hours) Cold Cranking Amps (CCA): 720 Marine Cranking Amps (CA/MCA): 900 Reserve Capacity (RC): 190 Minutes Technology: Maintenance-Free Wet Cell (Lead Acid) Warranty: 12-Month Replacement Dimensions & Fitment The Group 31 is a large-format battery. Ensure your battery box or tray is designed for this footprint: Imperial: 12.99in (L) x 6.77in (W) x 8.2in (H) Metric: 330mm (L) x 172mm (W) x 208mm (H) The Powerhouse Choice Why choose the M31? It offers the highest Reserve Capacity in our standard marine lineup. With 190 minutes of RC, it provides nearly 35% more runtime than a Group 27 battery. It is the go-to choice for: 24V or 36V Trolling motor systems (when used in series). Sailboats with significant "house" power needs. Off-grid marine power where solar charging is utilized.
![SeaHawk Group 31 Deep Cycle 800 Mca [DC31DT-S]](https://cdn.shopify.com/s/files/1/0148/6399/0848/products/EPMDC31DTS.gif?v=1741291947&width=480)
