41 A.H. Optima D51R Yellow Top Battery

OPTIMA Yellow Top batteries, featuring SPIRALCELL Technology, are designed for all of your deep cycle needs. It's perfect for people who are serious about sound. OPTIMA's power is cleaner with higher voltage output than conventional batteries. You can play your system louder and longer. And they have a greater cycle life so they can be drained and recharged more often. Plus, they're spill-proof and can withstand 15 times the vibration of ordinary batteries.

Sport Compact Power

The sport compact market has continued to grow in size and advance in technology over the last few years. New developments have created demanding electrical systems requiring a high performance deep-cycle automotive battery. OPTIMA batteries can meet the needs of more enthusiasts in the performance market. Our new group 51, 35 and 75/25 sizes are made just for your compact power needs.

Unequaled Vibration Resistance

Using OPTIMA SPIRALCELL Technology, cells are tightly compressed into supportive chambers, giving OPTIMA batteries over 15 times more vibration resistance than traditional batteries. This translates into longer battery life in high vibration applications.

Nonspillable

Due to its completely sealed case, the OPTIMA Yellow Top battery is extremely safe and corrosion resistant. Acid can't leak or spill, making them clean, user-friendly and environmentally sound. In addition, the maintenance free sealed case design eliminates the need to add water or clean terminals.

Dual Purpose (Starting and Deep Cycle) Batteries for Professional Use

OPTIMA YellowTop is made to install and forget. No matter the conditions, be it dampness, heat, dirt or exposure to extremes in vibration or regular discharge, you can count on OPTIMA to deliver uninterrupted power. OPTIMA's ability to hold a higher voltage during the discharge cycle makes it possible to utilize more of the stored power in the OPTIMA compared to ordinary batteries. The YellowTop handles many discharges as well as re-charges without losing significant capacity. OPTIMA is also ideal for seasonal use because of its very low self-discharge rate. That means you can store your seasonal vehicles all winter without regular charging and still spring out of the starting block when winter is over.

If your vehicle has a lot of accessories like running lights, winches, hydraulics, or a high-performance stereo/AV system it demands more from its battery. OPTIMA YellowTop batteries provide the extra performance and cycling capability that your vehicle demands.

Physical Characteristics:

Plate Design: High purity lead-tin alloy. Wound cell configuration utilizing proprietary SPIRALCELL® technology.
Electrolyte: Sulfuric acid, H2SO4
Case: Polypropylene
Color: Case: Light Gray
Cover: "OPTIMA" Yellow
Group Size: BCI: 51

Performance Data:

Open Circuit Voltage (fully charged): 13.1 volts
Internal Resistance (fully charged): 0.0046 ohms
Capacity: 41 Ah (C/20)
Reserve Capacity: BCI: 70 minutes (25 amp discharge, 80°F (26.7°C), to 10.5 volts cut-off)
Nominal Voltage: 12 volts

Power:
CCA (BCI 0°F): 500 amps
MCA (BCI 32°F): 625 amps

Recommended Charging:
The following charging methods are recommended to ensure a long battery life: (Always use a voltage regulated charger with voltage limits set as described below.)
Model: D51 and D51R
These batteries are designed for starting and deep cycling applications and for use in vehicles with large accessory loads.

Recommended Charging Information:

Alternator:
13.65 to 15.0 volts
Battery Charger (Constant Voltage):
13.8 to 15.0 volts; 10 amps maximum; 6-12 hours approximate
Float Charge:
13.2 to 13.8 volts; 1 amp maximum (indefinite time at lower voltages)
Rapid Recharge:
(Constant voltage charger)
Maximum voltage 15.6 volts. No current limit as long as battery temperature remains below 125°F (51.7°C). Charge until current drops below 1 amp.
Cyclic or Series String Applications:
14.7 volts. No current limit as long as battery temperature remains below 125°F (51.7°C). When current falls below 1 amp, finish with 2 amp constant current for 1 hour.
All limits must be strictly adhered to.

Recharge Time: (example assuming 100% discharge - 10.5 volts)

Recharge time will vary according to temperature and charger characteristics.

When using Constant Voltage chargers, amperage will taper down as the battery becomes recharged. When amperage drops below 1 amp, the battery will be close to a full state charge. (All charge recommendations assume an average room temperature of 77°F, 25°C)

Always wear safety glasses when working with batteries.

Always use a voltage regulated battery charger with limits set to the above ratings.

Overcharging can cause the safety valves to open and battery gases to escape, causing premature end of life.

These gases are flammable!

You cannot replace water in sealed batteries that have been overcharged.

Any battery that becomes very hot while charging should be disconnected immediately.

Not fully charging a battery can result in poor performance and a reduction in capacity.