Fullriver FT825-34 · Marine battery 65Ah 825A AGM
Specifications
| Brand | FULLRIVER |
|---|---|
| Part number | FT825-34 |
| Voltage (V) | 12 |
| Capacity (C20) | 65 |
| Cold cranking amps (EN) | 825 |
| Technology | AGM |
| Length | 261 mm |
| Width | 172 mm |
| Height | 208 mm |
Fullriver FT825-34 12V 65Ah 825A is a marine battery with reinforced anti-vibration case for moorings and offshore use. Tolerates the typical daily cycles on a boat (engine start + night-time services such as lights, sonar, fridge) and holds voltage even when the hull is rolling in open sea.
Why this marine battery?
- Marine designbuilt for boat swell and vibration
- Dual functionstarts the engine and powers onboard services
- Sealed and safemaintenance-free even when the boat rolls
Where it fits: the Fullriver FT825-34 is one of our boat batteries, belongs to our Fullriver batteries and by capacity it sits among our 65Ah batteries.

Marine battery Fullriver FT825-34 Full Throttle Series 65Ah 825A 12V
With 65 Ah at 12 V and 825 A of cold cranking current (EN), the Fullriver FT825-34 from the Full Throttle Series range is built for motor and sailing boats, both for engine starting and onboard services. Its 261 × 172 × 208 mm make it the exact replacement for the 65 Ah battery fitted as standard to many boats.
- Resistant to humidity and salt air.
- Sealed: no spills or gases in the locker.
- Ready for starting outboard and inboard engines.
- AGM: faster recharging and better cycle resistance than a conventional battery.
Will it fit your current battery tray?
The Fullriver FT825-34 is made in the 261 × 172 × 208 mm format and weighs 20.90 kg. It uses M8 + TP28 (SAE) terminals, the system that anchors and connects it in the vehicle. For a direct replacement, the current battery tray must accept these dimensions and the same terminal layout; otherwise adapters will be needed or the hold-down will change.
What the Fullriver FT825-34 is for
The Fullriver FT825-34 is designed for motor and sailing boats, both for engine starting and onboard services. If it is your starter battery, run the services from a separate battery; if it is a service battery, avoid routinely discharging it beyond 50%. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 20.90 kg and M8 + TP28 (SAE) terminals.
The Fullriver FT825-34: Full Throttle Series range and AGM technology
The Full Throttle Series is the Fullriver range the FT825-34 belongs to: it shares the same construction and quality criteria with the rest of the series, and varies in capacity and format to suit each vehicle.
AGM (Absorbent Glass Mat) technology seals the electrolyte in glass microfibre. The result is a maintenance-free battery that is highly vibration-resistant and able to withstand deep discharges that would ruin a classic lead-acid battery.
What Fullriver does differently
With its own plants and a catalogue focused on high-performance AGM, Fullriver is a familiar brand in power wheelchairs, boats and photovoltaic systems that need thousands of cycles. All the Fullriver batteries in our catalogue are genuine product, recently manufactured and covered by the manufacturer's warranty.
Manufacturer's warranty
The Fullriver FT825-34 comes with the manufacturer's official warranty against manufacturing defects. Deep discharge from winter lay-up without charging is not covered.
Usage and maintenance tips
At the end of the season, charge the battery fully and, if possible, keep it on a charger over the winter lay-up. As a service battery, avoid routine discharges below 50% to extend its cycle life.
Shipping, delivery and returns
Same-day dispatch from our warehouse for in-stock orders placed before 6:00 pm: 1 to 2 working days in mainland Spain and 1 to 3 working days in mainland Portugal, 1 to 5 days in the islands and the rest of Europe. Returns are accepted for 14 days if the battery has not been used (free collection on the Iberian mainland). You will receive tracking by email.
Data sheet
-
BrandFULLRIVER
-
ReferenceFT825-34
-
ModelFull Throttle Series
-
Voltage (V)12
-
Length261 mm
-
Width172 mm
-
Height208 mm
-
Weight20.90 Kgs
-
TechnologyAGM
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EAN810233030510
-
Terminal typeM8 + TP28 (SAE)
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Cold cranking amps (EN)825
-
Capacity (C20)65
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Case type34
Specific References
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UPC810233030510
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MPNFT825-34
Fullriver FT825-34: best-selling equivalent or higher-spec batteries
The Fullriver FT825-34 is interchangeable with these equivalent references: FT825-78 (Fullriver).
| Product | Specifications | Technology | Price | |||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Fullriver
FT825-34
This battery
|
12V 65Ah 825A | AGM | 308,95 € | |||||||||||||||||||||
Fullriver
FT825-78
Same range |
12V 65Ah 825A | AGM | 327,95 € +19,00 € | |||||||||||||||||||||
| ||||||||||||||||||||||||
| FT825-34 | FT825-78 | |
|---|---|---|
| Capacity | 65 Ah | 65 Ah |
| Cold cranking (EN) | 825 A | 825 A |
| Technology | AGM | AGM |
| Dimensions (mm) | 261 × 172 × 208 | 261 × 172 × 211 |
| Positive terminal | — | — |
| Price | 308,95 € | 327,95 € |
Equivalences verified by our technical team: same dimensions, polarity, capacity and CCA. Official manufacturer warranty on every option.
Other 65Ah batteries: We stock 22 models of 65 Ah to compare by price, technology and cold cranking: see all 65Ah batteries.
Recommended accessories
Frequently asked questions
Is the Fullriver FT825-34 an AGM battery and what are the benefits of AGM?
Yes. The Fullriver FT825-34 is AGM (Absorbent Glass Mat): sealed lead-acid, with the electrolyte absorbed in glass fibre. It tolerates heat better and handles more cycles than a conventional battery.
In what position can it be installed on the boat?
Being AGM, it is sealed and does not spill: it can be mounted tilted (never upside down) and copes well with vibration and wave impacts. Secure it firmly and keep the terminals away from water.
What size is this battery?
Measure your boat's battery tray first; if the battery exceeds it by even a millimetre, the hold-down clamp may not close. Length × width × height: 261x172x208 mm. Height is measured to the top of the terminals.
Fullriver FT825-34 or Fullriver FT825-78: which one to choose?
Same range and the same performance as the FT825-34. Compared with the FT825-34 it has the same Ah and cranking power. It costs 19,00 € more. Either one works; decide by price.
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