Optima YTR-3.7 · Caravan battery 12V 48Ah 660A AGM
Specifications
| Brand | OPTIMA |
|---|---|
| Part number | YTR-3.7 |
| Voltage (V) | 12 |
| Capacity (C20) | 48Ah (c20) |
| Capacity (C5) | 44Ah (c5) |
| Technology | AGM ESPIRAL |
| Length | 237.00 mm |
| Width | 172.00 mm |
| Height | 168.00 mm |
€203.80
VAT included
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El mejor precio para una batería online
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Para mi gusto esta web lo tiene todo, variedad de productos, atención telefónica buena, entrega en plazo y asesoría gratis al momento de…
Optima YTR-3.7 12V 48Ah 660A is a leisure battery for campers, motorhomes and caravans. Designed to power the entire interior kit (fridge, heater, water pump, USB, LED lighting) for several days off-grid, with no need to plug into a campsite hookup.
Why this caravan battery?
- Real off-grid autonomyno campsite hookup needed
- Lasts the whole seasonhandles daily discharges without capacity loss
- Powers it all at oncefridge, water pump, LED and USB without issues
Voltage
12 V
Capacity
48 Ah
Cold cranking
660 A
Dimensions
237×172×197 mm
Technology
AGM ESPIRAL
Polarity
Positive on the right
Weight
17,6 kg
Model
OPTIMA YELLOW TOP
Leisure battery Optima YTR-3.7 Yellow Top 48Ah 660A 12V
12VVoltage
48AhCapacity
660ACold cranking
17kgWeight
The Optima YTR-3.7 with spiral-cell AGM technology stores 48 Ah at 12 V: autonomy for motorhomes, caravans and campers that need power off-grid. Its 237 × 172 × 168 mm and the positive terminal on the right make it the exact replacement for the 48 Ah battery fitted as standard to many motorhomes and caravans.
- Direct replacement for the original leisure battery.
- Recharges from the alternator, a solar panel or a mains charger.
- Withstands daily discharges throughout the season.
- Spiral AGM construction, sealed and mountable in any position.
What the Optima YTR-3.7 is for
With 48 Ah, the Optima YTR-3.7 is the habitation battery for motorhomes, caravans and campers that need power off-grid. It recharges from the alternator, a solar panel or a mains charger. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 17 kg, 1 terminals and B1 hold-down.
Will it fit your current battery tray?
In terms of format, the Optima YTR-3.7 measures 237 × 172 × 168 mm (length × width × height) and weighs 17 kg. The positive terminal on the right decides which side the cables end up on: it is the detail that causes most buying mistakes, so check it before ordering. It uses a B1 hold-down and 1 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 Optima does differently
The Optima Red, Yellow and Blue Top are references for high-performance starting, deep cycling and marine use respectively, all with the characteristic six spiral-cell design. All the Optima batteries in our catalogue are genuine product, recently manufactured and covered by the manufacturer's warranty.
The Optima YTR-3.7: Yellow Top range and spiral-cell AGM technology
The YTR-3.7 is part of the Optima Yellow Top range. Choosing the right reference within the series comes down to capacity, dimensions and terminals: technology and quality are common to the whole family.
In a spiral-cell battery the electrolyte is absorbed and the plates are wound under pressure. That lets it deliver very high current peaks, recharge quickly and be mounted in any position.
Care and maintenance
Avoid routinely discharging the leisure battery below 50% and recharge it fully after every trip. During months of storage, keep it charged with a mains charger or a small solar panel; a battery left discharged for weeks loses capacity permanently.
Official warranty
The Optima YTR-3.7 comes with the manufacturer's official warranty against manufacturing defects. Avoid repeated full discharges: they shorten its life and are not covered.
Delivery times 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-OPTIMA-YTR-3.7
Data sheet
- Brand
- OPTIMA
- Reference
- YTR-3.7
- Model
- OPTIMA YELLOW TOP
- Voltage (V)
- 12
- Length
- 237.00 mm
- Width
- 172.00 mm
- Height
- 168.00 mm
- Weight
- 17 Kgs
- Technology
- AGM ESPIRAL
- EAN
- 4016987114667
- Terminal layout
- Positive terminal on the right
- Terminal type
- 1
- Hold-down
- B1
- Cold cranking amps (EN)
- 660A
- Capacity (C20)
- 48Ah (c20)
- Capacity (C5)
- 44Ah (c5)
- ETN
- 8402220008882
Specific References
- EAN13
- 4016987114667
- MPN
- YTR-3.7
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★★★★★Gonzalo Gomez
15/07/2026Os recomiendo comprar en baterias.com
El mejor precio para una batería online
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11/05/2026Muy útil su ayuda
No tenía ni idea de cómo instalar una batería y me ayudaron. Al final fue fácil
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18/02/2026En la web encuentras de todo
Para mi gusto esta web lo tiene todo, variedad de productos, atención telefónica buena, entrega en plazo y asesoría gratis al momento de la instalación.
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16/02/2026Buena atención y entrega rápida
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06/02/2026Buen servicio
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04/01/2026Gracias
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Codes and references Optima YTR-3.7
| Brand | Optima · see all batteries Optima |
|---|---|
| Manufacturer range | OPTIMA YELLOW TOP |
| Manufacturer reference (MPN) | YTR-3.7 |
| ETN code | 8402220008882 (short form 840 222 000) |
| EAN-13 barcode | 4016987114667 |
| Dimensions (length × width × height) | 237 × 172 × 197 mm (237x172x197) |
Comparison: Optima YTR-3.7 vs equivalents
The Optima YTR-3.7 is interchangeable with these equivalent references: RTR-3.7 (Optima).
| Product | Specifications | Technology | Price |
|---|---|---|---|
Optima
YTR-3.7
This battery
|
12V 48Ah 660A | AGM | €203.80 |
Optima
RTR-3.7
|
12V 44Ah 730A | AGM | €191.90 |
Equivalences verified by our technical team: same dimensions, polarity, capacity and CCA. Official manufacturer warranty on every option.
Recommended accessories
How to change the battery
Guide to replace the leisure battery of your motorhome or caravan. Estimated time 15-25 minutes. Important: isolate the 12V auxiliary system before handling.
Step 1. Switch off 12V equipment and unplug shore power
Turn off fridge, lights, water pump, Truma Mover and other auxiliary loads. Disconnect the 230V shore power and solar panels if any.
Step 2. Locate the leisure battery compartment
On motorhomes usually under the driver/passenger seat, in an outside locker or in the garage area. Verify this is NOT the engine starter battery — that one is up front with the engine.
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
Loosen the bottom hold-down clamp with the same wrench. Lift the battery carefully (it can weigh 15-25 kg). Clean the tray with a brush and baking soda if there is corrosion.
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 the charger and auxiliary services
After connecting, check the combi charger (CBE/Schaudt/Nordelettronica) recognises the new battery: voltage should stabilise at 13.2-13.8 V with 230V connected. Test a couple of services (lights + pump) before heading out.
Frequently asked questions
Is the Optima YTR-3.7 an AGM battery and what are the benefits of AGM?
Yes. The YTR-3.7 from Optima 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 caravans with advanced Start-Stop and regenerative braking. Expected lifespan: 5-8 years under normal conditions.
How is the Optima YTR-3.7 battery installed in the vehicle?
In most caravans 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 caravans with Start-Stop or BMS, register the battery via OBD so the alternator applies the correct charging profile.
How long does the Optima YTR-3.7 battery last?
Expected lifespan of the Optima YTR-3.7 is 5 to 8 years in mild-climate caravan 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 237×172×197 mm — also written as 237x172x197 mm — following the European DIN standard. Always measure the space in your caravan before buying: even one extra millimetre can prevent the hold-down clamp from closing. The height shown includes the terminals.
What ETN and EAN codes does the Optima YTR-3.7 battery have?
The manufacturer reference (MPN) is YTR-3.7 and its ETN code is 8402220008882 (short form 840 222 000), the European identifier used in spare-part catalogues. The EAN-13 barcode is 4016987114667. It belongs to the OPTIMA YELLOW TOP range. Any of these codes identifies exactly this battery when requesting quotes or comparing prices.
Does this battery fit my caravan?
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 YTR-3.7 typically fits a wide range of European vehicles thanks to its standard DIN case format.
Which batteries are equivalent to the Optima YTR-3.7?
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 caravans. See the "Equivalents" section to view recommended options at the same performance level.
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