Aki Optima Kuning Heavy Duty Multi Fungsi Optima Batteries Yellow Top D31 Original
Battery Model: YT S 5,5
Part Number: 851 187 000 888 2
Nominal Voltage: 12 volts
NSN: 6140 01 502 4973
Description: High power, dual purpose engine start and deep
cycle, sealed lead acid battery
Plate Design: High purity lead-tin alloy. Wound cell configuration utilizing proprietary
Electrolyte: Sulfuric acid, H2SO4
Color: Case: Light Gray
Cover: “OPTIMA“ Yellow
Group Size: BCI: 31
Height:238 mm (height at the top of the terminals)
Terminal Configuration: SAE / BCI automotive.
Open Circuit Voltage (fully charged): 13.1 volts
Internal Resistance (fully charged): 0.0025 ohms
Capacity: 75 Ah (C/20)
Reserve Capacity: BCI: 155 minutes
(25 amp discharge, 80°F (26.7°C), to 10.5 volts cut-off)
CCA (EN -18°C): 975 amps
MCA (BCI 0°C): 1125 amps
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
(Constant voltage charger)
Maximum voltage 15.6 volts. No current limit as long as battery
temperature remains below 50°C (125°F). 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 50°C (125°F). 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)
Approx. time to 90% charge
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 25°C, 77°F)
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
Not fully charging a battery can result in poor performance and a reduction in capacity.