【Optima YellowTop YT925U | Deep-Cycle Battery for High-Capacity Car Audio and Electrical Systems】

As more devices in your car use electricity—such as car audio and security systems—the battery is required to handle not only starting, but also everyday charging and discharging.

Optima YellowTop YT925U is a deep-cycle battery designed for repeated deep discharges and recharges. It’s well-suited for vehicles equipped with high power-consuming equipment such as large audio systems, winches, and engine heaters.

With Optima’s unique spiral-cell technology, it helps maintain voltage and keeps internal resistance low. As a result, it’s easier to draw power when needed, and it also offers performance suitable for use as a starter battery. Since it has low self-discharge, it’s also convenient for vehicles driven only a few times per month and those used seasonally.

In car audio, simply replacing the battery doesn’t always dramatically change the sound. However, the stability of the power supply forms the foundation of the entire system. If you’re concerned about the sense of power in the mid and low ranges, the texture in the high ranges, or how well the sound comes together, it’s worth reviewing not only the amplifier and speakers, but also the power environment.

In particular, this is a battery that’s easy to consider for vehicles with high-output engines, American cars, cars with well-built car audio systems, cars with security systems installed, and vehicles that frequently use electrical accessories.

That said, choosing a battery involves more than just capacity and terminal position. It’s also important to consider the space available on the vehicle side, the state of charge, how often you use the battery, and the balance with the electrical equipment installed. Depending on the vehicle model, you may need to check the terminals and mounting method, so I wouldn’t decide based on the product alone—I would select it while looking at the actual vehicle.

At LOGON, we confirm the configuration of your car audio and security system, your typical driving habits, and the condition of your current battery, and we guide you—including whether replacing the battery is actually worthwhile. If you’re going to replace it, I’d like to think together about getting you to the point where you can use it with peace of mind after installation.

Main Specifications / Specs

【Basic Information】
Product name: YellowTop YT925U
Brand: OPTIMA (Optima)
Type: Deep-cycle battery
Model notation: YT U3.7L

【Features】
・Supports repeated charge and discharge
・Usable as a starter battery as well
・Low self-discharge rate
・Maintenance-free
・Uses spiral-cell technology

【Terminals / Standards】
Terminal standard: R terminal + side terminal
20-hour rate (EN) / BCI: G75 / 35

【Dimensions】
Width: 237 mm
Depth: 165 mm
Box height: 172 mm
Total height: 199 mm