12VVoltage
48AhCapacity, 20-hour rate (C20)
660ACold cranking amps
Quick answer: Built for boats and motorhomes, the Optima YTR-3.7 carries the rating 48Ah 12V 660A. Size and polarity decide most swaps, and both are listed on this page.
Getting the best from the Optima YTR-3.7
Three nights at anchor with the fridge running show quickly what a battery bank can really do. Add up each appliance's daily watt-hours and leave plenty of headroom when sizing a bank. Years of nightly cycling eventually take their toll on any leisure battery.
Optima YTR-3.7 data sheet
How spiral-cell AGM batteries work and how to look after them
No caps, no water and no acid to check on a spiral battery. Off-road vehicles and rally cars love spiral cells for their vibration resistance. Recharge after heavy accessory use.
Common questions about the Optima YTR-3.7
What is the barcode number of this product?
Its EAN is 4016987114667; you will usually spot it near the barcode on the box.
How do I check compatibility quickly?
Read the code on your old unit and set it beside YTR-3.7, then check dimensions, terminal layout and electrical ratings on this page. If all of them match, the replacement is equivalent.
How long does ordering take at baterias.online?
Only a few minutes once you have checked the figures and the code.
Where is the code on my battery printed?
Use a tape measure and the handbook: the factory fitment listed there tells you which code to search.
About the Optima YTR-3.7
Found Optima YTR-3.7 written in the boat's logbook? You are in the right place. Leisure batteries are judged on capacity and recovery more than on cranking. Buying batteries online saves carrying heavy units along a pontoon twice.
48Ah suits engines with modest electrical demands. A cranking figure of 660A is high for a case this size.
See also
Prefer to order now and fit at the weekend? baterias.online makes that easy. Writing the fitting date on the battery helps when planning the next replacement.
Check before ordering
- ✓ Will it fit? The Optima YTR-3.7 measures 237 × 172 × 197 mm, so compare length first, then width, then height with the lid or bonnet closed.
- ✓ Before ordering, glance at your current battery: this reference is positive on the right-hand side, and your cables need to reach that corner.
- ✓ Consider extra loads such as a tow bar when comparing 48Ah.
