The ES50M SSB Marine Starting Battery is engineered specifically for marine environments, delivering high cranking power, strong amp‑hour capacity, and exceptional durability for boats, jet skis, outboards, inboards, and marine accessories. Unlike standard automotive batteries, marine batteries must deliver both high CCA for engine starting and deep‑cycle‑like capacity to power onboard electronics — even when the engine is off. The ES50M is built precisely for this dual‑demand marine use.
Using Genuine Cast Calcium‑Calcium Maintenance‑Free Technology, Marine Grade Extra Thick Plates, and Glass Matt Separators, the ES50M provides 550CCA, 55Ah, and 115 minutes of reserve capacity, making it one of the most reliable marine starting batteries in its class.
The ES50M is designed to withstand harsh marine conditions including vibration, moisture, salt exposure, and temperature extremes. Its sealed, maintenance‑free design means no topping up, no water checks, and no corrosion issues — simply install and enjoy reliable marine power.
Whether you operate a fishing boat, runabout, cruiser, or ski boat, the ES50M delivers dependable starting performance and stable accessory power.
The ES50M includes a Marine Warranty (see manufacturer warranty guide for details).
Battery Now NSW provides mobile marine battery replacement across Sydney, including testing, installation, and old battery recycling.
📞 Call 0450 131 148 for fast mobile installation anywhere in Sydney.
| Specification | Value |
|---|---|
| Voltage | 12V |
| CCA | 550CCA |
| Reserve Capacity | 115 minutes |
| AH (20HR) | 55Ah |
| Length | 230mm |
| Width | 171mm |
| Height | 202mm |
| Terminal Height | 223mm |
| Weight | 14.9kg |
| Terminal Type | STD |
| Terminal Assembly | Type 1 |
| Battery Type | Flooded Lead‑Acid |
| Separator Type | Glass Matt |
| Plate Type | Cast Calcium‑Calcium |
| Range | SSB Marine |
| Warranty | Marine Warranty |
📞 Call 0450 131 148 for mobile marine battery replacement anywhere in Sydney.
| Model | CCA | Type | Notes |
|---|---|---|---|
| ES50M | 550 | Marine MF | Your product |
| MF50D | 510 | Marine | Lower CCA, similar size |
| ES55D23R | 570 | Silver MF | Car battery alternative |
| SS55D23R | 700 | Gold MF | Higher CCA automotive |
| LS55D23L | 1400 | Lithium | Extreme upgrade |
| MF70ZZDT | 800 | Commercial | Larger truck/marine option |
| Brand | Equivalent Model | Notes |
|---|---|---|
| Century | Marine Pro 550 | Similar performance |
| Supercharge | SeaMaster 550 | Same class |
| ACDelco | M50 | Similar footprint |
| Yuasa | Marine 55Ah | Same fitment |
| Bosch | Marine 55Ah | Similar marine battery |
| Exide | Nautilus 55Ah | Same category |
The ES50M is ideal for:
Battery Now NSW provides:
Service areas include:
Illawong, Menai, Bangor, Alfords Point, Sutherland, Engadine, Kirrawee, Gymea, Miranda, Caringbah, Cronulla, Liverpool, Moorebank, Wattle Grove, Bankstown, Parramatta, Penrith, Campbelltown, Hurstville, Kogarah, Rockdale, Mascot, Botany, Sydney CBD, Eastern Suburbs, Inner West, Western Sydney, South West Sydney, St George Region, and surrounding suburbs.
📞 Call 0450 131 148 for immediate assistance.
Yes — with 550CCA, it is ideal for small to mid‑size outboards and inboards.
Yes — its 55Ah capacity supports lights, radios, GPS, pumps, and electronics.
Yes — it is sealed and requires no water top‑ups.
Yes — it is engineered for marine pounding, waves, and rough conditions.
Most users experience 2–4 years, depending on usage and charging.
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