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D34 Optima Yellow Top Start/Cycle Battery 12v

D34 Optima Yellow Top Start/Cycle Battery 12v
12v Deep-cycling and cranking power
Up to 2 times longer life PERFORMANCE, More than 15 times the vibration resistance, Virtually spillproof, mountable in, virtually any position, Maintenance-free, Faster recharging, Optimal starting power, 300+ discharge/recharge cycles
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NZ$ 619.00 including GST
NZ$ 30.00
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OPTIMA YELLOWTOP D34 Ultra high-performance SPIRALCELL TECHNOLOGY AGM (absorbent glass mat) dual-purpose deep-cycle and starting battery. OPTIMA YELLOWTOP batteries have three times the cycling capability (rechargeability) with ultimate cranking power for your auto, car or truck to outperform traditional batteries. Perfect for powering heavy electrical loads, including winches, audio systems, inverters, and other demanding vehicle accessories and electronics. Lower internal resistance provides more efficient power output and faster recharges.

The OPTIMA model number for this battery is D34. If you are replacing an OPTIMA battery you already have, this model is the same as batteries marked 8012-021, 9012-021, 27992, SC34DA, N9934YEL or YEL34 and D34/78

Performance Data

Cold Cranking Amps: 750
Cranking Amps: 870
Nominal Voltage: 12 volts
Open Circuit Voltage (fully charged): 13.1 volts
Internal Resistance (fully charged): 0.0028 ohms
Capacity: 55 Ah (C/20)
Reserve Capacity: BCI: 120 minutes (25 amp discharge, 80°F (26.7°C), to 10.5 volts cut-off)

Physical Characteristics

Plate Design:

High purity lead-tin alloy.  Wound cell configuration utilizing proprietary


Sulfuric acid, H2SO4

Case: Polypropylene
Case Color: Light Gray
Cover Color: “OPTIMA“ Yellow
Group Size: BCI: 34
Post Type: SAE Post
Weight: 42.9 lb
Length: 267mm
Width: 172mm
Height: 199mm


CCA (BCI 0°F): 750 amps
MCA (BCI 32°F): 870 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: D34
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: 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 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 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.

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