Fullriver DC38-12 · Marine battery 12V 38Ah 265A AGM
Specifications
| Brand | FULLRIVER |
|---|---|
| Part number | DC38-12 |
| Voltage (V) | 12 |
| Capacity (C20) | 38Ah (c20) |
| Capacity (C5) | 31Ah (c5) |
| Technology | AGM |
| Length | 198.00 mm |
| Width | 166.00 mm |
| Height | 174.00 mm |
€159.10
VAT included
4,79/5★★★★★31 reviewsVerified purchases
- ★★★★★Pablo Lopez:
Les llamé y me resolvieron varias dudas sobre la instalación de mi batería
- ★★★★Jose Maria Vicente:
No tengo mas que palabras de agradecimiento, la batería me llego al día siguiente y me asesoraron gratis para la instalación
- ★★★★★Jaime Vicente:
Te atienden fenomenal
Fullriver DC38-12 12V 38Ah 265A is a marine battery, vibration- and deep-discharge resistant, suitable both for outboard engine starting and for onboard auxiliary services (navigation lights, GPS, sonar, fridge). Sealed and maintenance-free.
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
Voltage
12 V
Capacity
38 Ah
Cold cranking
265 A
Dimensions
198×166×171 mm
Technology
AGM
Weight
13,5 kg
Model
DC Series
Marine battery Fullriver DC38-12 DC 38Ah 265A 12V
12VVoltage
38AhCapacity
265ACold cranking
13.30kgWeight
The Fullriver DC38-12 marine battery offers 12 V, 38 Ah and 265 A of cold cranking current (EN) from the DC range with AGM technology, designed for motor and sailing boats, both for engine starting and onboard services. Measuring 198 × 166 × 174 mm, it is the direct replacement for boats fitted from the factory with a 38 Ah battery of this format.
- Sealed: no spills or gases in the locker.
- Resistant to humidity and salt air.
- AGM: faster recharging and better cycle resistance than a conventional battery.
- Ready for starting outboard and inboard engines.
What the Fullriver DC38-12 is for
The Fullriver DC38-12 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 13.30 kg and M6 terminals.
The Fullriver DC38-12: DC range and AGM technology
The DC38-12 is part of the Fullriver DC range. Choosing the right reference within the series comes down to capacity, dimensions and terminals: technology and quality are common to the whole family.
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.
Size, terminals and hold-down of the Fullriver DC38-12
It has external dimensions of 198 × 166 × 174 mm and weighs 13.30 kg. It uses M6 terminals, the system that anchors and connects it in the vehicle. Checking the three dimensions and the terminal position before buying avoids the most common mistake when replacing a battery.
Fullriver: the maker behind the DC38-12
Fullriver specialises in deep-cycle AGM batteries for mobility, marine, solar and traction. Its DC and HC series are known for their tolerance to deep discharge and long cycle life. All the Fullriver batteries in our catalogue are genuine product, recently manufactured and covered by the manufacturer's warranty.
Usage and maintenance tips
Protect the terminals with dielectric grease and check the fixing: vibration and swell loosen connections. As a service battery, avoid routine discharges below 50% to extend its cycle life.
Warranty and coverage
The Fullriver DC38-12 comes with the manufacturer's official warranty against manufacturing defects. Deep discharge from winter lay-up without charging is not covered.
Shipping, delivery and returns
Order before 6:00 pm with stock available and it leaves today: mainland Spain and Portugal receive it in 24-48 working hours, the islands and the rest of the EU in 3 to 5 days. You have 14 days to return it if it has not been installed, with free collection on the mainland, and shipment tracking by email.
BCOM-FULLRIVER-DC38-12
Data sheet
- Brand
- FULLRIVER
- Reference
- DC38-12
- Model
- FULLRIVER DC
- Voltage (V)
- 12
- Length
- 198.00 mm
- Width
- 166.00 mm
- Height
- 174.00 mm
- Weight
- 13.30 Kgs
- Technology
- AGM
- Terminal type
- M6
- Cold cranking amps (EN)
- 265
- Capacity (C20)
- 38Ah (c20)
- Capacity (C5)
- 31Ah (c5)
Specific References
- MPN
- DC38-12
4,79/5
Verified purchasesLatest verified reviews
★★★★★Pablo Lopez
08/05/2026Muy útil su ayuda
Les llamé y me resolvieron varias dudas sobre la instalación de mi batería
★★★★★Jose Maria Vicente
13/01/2026Me ayudaron paso a paso
No tengo mas que palabras de agradecimiento, la batería me llego al día siguiente y me asesoraron gratis para la instalación
★★★★★Jaime Vicente
02/01/2026Servicio autentico
Te atienden fenomenal
★★★★★Jordi Arias
05/12/2025Gracias por sus indicaciones
Les llamé y me resolvieron varias dudas sobre la instalación de mi bateria
Recommended accessories
How to change the battery
Guide to replace a marine battery (cranking or house) in 20-30 minutes. Moisture and vibration in marine environments require reinforced hold-downs and sealed copper terminals.
Step 1. Prepare the vehicle
Park on a flat surface, switch off the engine and remove the key. Make sure all lights and electrical accessories are off. Wait 1-2 minutes before starting.
Step 2. Locate the battery compartment
Usually under the passenger bench, engine room or a dedicated ventilated compartment. Verify the compartment is dry and well ventilated before opening.
Step 3. Disconnect the negative (−) terminal
Use the 10 mm wrench to loosen the negative cable nut (black, marked −) and remove the cable from the post. Move it aside so it cannot touch any bodywork.
Step 4. Disconnect the positive (+) terminal
Repeat with the positive cable (red, marked +). Important: never let a terminal touch metal of the car while the other is still connected.
Step 5. Remove the old battery
Marine batteries are heavy (15-50 kg). If it has rope handles, use them; otherwise have a carry strap ready. Secure the new one with metal hold-downs (not plastic) to resist sea-state vibration.
Step 6. Install the new battery
Place the battery in the same orientation as the old one (positive terminal on the same side). Tighten the hold-down clamp firmly.
Step 7. Connect the cables
Connect the positive (+) terminal first, then the negative (−). Tighten the nuts with the wrench until each terminal does not move. Apply anti-spark grease if you have any.
Step 8. Verify circuit + water protection
Apply dielectric grease on terminals to prevent salt-air corrosion. Check the engine charging circuit delivers 13.8-14.4 V at 2,000 rpm.
Frequently asked questions
Is the Fullriver DC38-12 an AGM battery and what are the benefits of AGM?
Yes. The DC38-12 from Fullriver uses AGM (Absorbent Glass Mat) technology: a sealed lead-acid battery where the electrolyte is absorbed in a glass-fibre mat. It withstands more charge/discharge cycles than a conventional one, handles heat better and is the required technology for boats with advanced Start-Stop and regenerative braking. Expected lifespan: 5-8 years under normal conditions.
How do I fit the DC38-12 model in my boat?
In most boats it fits in 15-30 minutes with a 10 mm wrench; if the battery is under the seat or in the boot the time can double. See the step-by-step guide on this page. Quick summary: 1) switch off the engine and remove the key; 2) locate the original battery (engine bay, boot or under seat); 3) disconnect the negative (−) terminal first, then the positive (+); 4) loosen the hold-down clamp and remove the old battery; 5) fit the new one in the same orientation — match the polarity shown on the product sheet; 6) connect the positive (+) first, then the negative (−). On boats with Start-Stop or BMS, register the battery via OBD so the alternator applies the correct charging profile.
How long does the Fullriver DC38-12 battery last?
Expected lifespan of the Fullriver DC38-12 is 5 to 8 years in mild-climate boat use with Start-Stop. In cold regions it drops slightly due to cold-start stress; in very hot regions it also drops because of electrolyte evaporation. To extend its life: avoid deep discharges (headlights on with engine off), have the alternator checked yearly, and keep the battery clean and properly secured.
What size is this battery?
Dimensions (length × width × height) are 198×166×171 mm — also written as 198x166x171 mm — following the European DIN standard. Always measure the space in your boat before buying: even one extra millimetre can prevent the hold-down clamp from closing. The height shown includes the terminals.
Is the DC38-12 valid for my vehicle?
Three options to confirm: 1) enter your number plate in the finder (DGT/DVLA/KBA auto-detect your model and engine); 2) check the "Compatible vehicles" tab on this page, where we list every vehicle verified by our technical team; 3) if you cannot find your model, message us on WhatsApp with brand, model, engine and year — we reply during business hours (Mon–Fri 10:00–13:30 and 16:40–18:00 (Spanish time, CET)). The DC38-12 typically fits a wide range of European vehicles thanks to its standard DIN case format.
Which batteries are equivalent to the Fullriver DC38-12?
Directly interchangeable batteries (same dimensions, same polarity, same Ah and CCA) are the OEM equivalents from leading brands: Bosch, Tudor, Exide and, depending on the model, Banner or Yuasa. Exact equivalence depends on technology — an EFB cannot be replaced with a conventional battery in Start-Stop boats. See the "Equivalents" section to view recommended options at the same performance level.
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