The Ultimate Power Source ™

Charging OPTIMA® Batteries

Charging OPTIMA® Batteries Compare OPTIMA® Chargers Digital 400 vs. Digital 1200 Are the OPTIMA® Chargers and Maintainer easy to use? Why are the OPTIMA® chargers different or better than others? What is the OPTIMA® Chargers Digital 1200 12V Performance Battery Charger and Maintainer? Benefits of the OPTIMA® Chargers Digital 400 and Digital 1200 12V Performance Battery Charger and Maintainer Are OPTIMA® Chargers Mandatory for OPTIMA Batteries? What batteries can I use with the OPTIMA® Chargers Digital 400 and Digital 1200 12V Performance Battery Charger and Maintainer? Can the OPTIMA® Chargers Digital 1200 12V Performance Battery Charger and Maintainer charge anything else besides batteries? Charging Your AGM Battery How to Resuscitate a Deeply Discharged AGM Battery Recommended Battery Voltage Do I need a special charger for my OPTIMA® battery? What does "multistage charging" mean?

OPTIMA YELLOWTOP® Charging Information

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.

YELLOWTOP Type: D51 & D51R - D35 – DS46B24R - D75/25 - D34 – D34/78 - D27F

These batteries are dual-purpose. They are designed for engine start and cyclic applications and for use in vehicles with large accessory loads.

Recommended charging information:

  • Alternator:
    • 13.65 to 15.0 volts, no amperage limit.
  • Battery Charger:
    • 13.8 to 15.0 volts, 10 amps maximum, approximately for six to twelve hours.
  • Cyclic Applications:
    • 14.7 volts, no current limit as long as battery temperature remains below 125°F (51.7°C). When current falls below one amp, finish with two-amp constant current for one hour.
  • Rapid Recharge:
    • Maximum voltage 15.6 volts (regulated), no current limit as long as battery temperature remains below 125°F (51.7°C). Charge until current drops below one amp.
  • Float Charge:
    • 13.2 to 13.8 volts, one amp maximum current, time indefinite (at lower voltage).
    • Strictly adhere to all limits.

OPTIMA Commercial YELLOWTOP Charging Information

YELLOWTOP Type: D31A & D31T

These batteries are dual-purpose. They are designed for engine start and deep-cycle applications for use in vehicles with large accessory loads.

Recommended charging information:

  • Alternator:
    • 13.65 to 15.0 volts, no amperage limit.
  • Battery Charger:
    • 13.8 to 15.0 volts, 10 amps maximum, approximately for six to twelve hours.
  • Cyclic Applications:
    • 14.7 volts, no current limit as long as battery temperature remains below 125°F (51.7°C). When current falls below one amp, finish with three-amp constant current for one hour.
  • Rapid Recharge:
    • Maximum voltage 15.6 volts (regulated), no current limit as long as battery temperature remains below 125°F (51.7°C). Charge until current drops below one amp.
  • Float Charge:
    • 13.2 to 13.8 volts, one amp maximum current, time indefinite (at lower voltage).
    • Strictly adhere to all limits.

OPTIMA BLUETOP® Charging Information

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.

BLUETOP Type: 34M

These batteries are designed for engine starting applications. They are NOT recommended or warranted for use in deep-cycle applications.

Recommended charging information:

  • Alternator:
    • 13.3 to 15.0 volts, no amperage limit.
  • Battery Charger:
    • 13.8 to 15.0 volts, 10 amps maximum, approximately for six to twelve hours.
  • Rapid Recharge:
    • Maximum voltage 15.6 volts (regulated), no current limit as long as battery temperature remains below 125°F (51.7°C). Charge until current drops below one amp.
  • Float Charge:
    • 13.2 to 13.8 volts, one amp maximum current, time indefinite (at lower voltage).
    • Strictly adhere to all limits.

BLUETOP Type: D34M / D31M/ D27M

These batteries are dual-purpose. They are designed for engine starting and deep cycling applications, as well as for use in boats with large accessory loads.

Recommended charging information:

  • Alternator:
    • 13.65 to 15.0 volts, no amperage limit.
  • Battery Charger:
    • 13.8 to 15.0 volts, 10 amps maximum, approximately for six to twelve hours.
  • Cyclic Applications:
    • 14.7 volts, no current limit as long as battery temperature remains below 125°F (51.7°C). When current falls below one amp, finish with two-amp constant current for one hour for D34M and three-amp constant current for one hour for D27M and D31M.
  • Rapid Recharge:
    • Maximum voltage 15.6 volts (regulated), no current limit as long as battery temperature remains below 125°F (51.7°C). Charge until current drops below one amp.
  • Float Charge:
    • 13.2 to 13.8 volts, one amp maximum current, time indefinite (at lower voltage).
    • Strictly adhere to all limits.

OPTIMA REDTOP® Charging Information

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.

REDTOP Type: 34 & 34R - 34/78 - 78 - 25 & 35 - 75/25

These batteries are designed for engine starting applications. They are NOT recommended or warranted for use in deep-cycle applications.

Recommended charging information:

  • Alternator:
    • 13.3 to 15.0 volts, no amperage limit.
  • Battery Charger:
    • 13.8 to 15.0 volts, 10 amps maximum, approximately for six to twelve hours.
  • Rapid Recharge:
    • Maximum voltage 15.6 volts (regulated), no current limit as long as battery temperature remains below 125°F (51.7°C). Charge until current drops below one amp.
  • Float Charge:
    • 13.2 to 13.8 volts, one amp maximum current, time indefinite (at lower voltage).
    • Strictly adhere to all limits.

REDTOP Type: 6V

These batteries are designed for engine starting applications. They are NOT recommended or warranted for use in deep-cycle applications.

Recommended charging information:

  • Alternator:
    • 6.65 to 7.5 volts, no amperage limit.
  • Battery Charger:
    • 6.9 to 7.5 volts, 10 amps maximum, approximately for six to twelve hours.
  • Rapid Recharge:
    • Maximum 7.8 volts (regulated), no current limit as long as battery temperature remains below 125°F (51.7°C). Charge until current drops below one amp.
  • Float Charge:
    • 6.6 to 6.9 volts, one amp maximum current, time indefinite (at lower voltage).
    • Strictly adhere to all limits.
  • Safety Information:
    • 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 gasses to escape, resulting in premature failure. These gasses are flammable! You cannot replace water in sealed batteries that have been overcharged. Any battery that becomes very hot or makes a hissing sound while recharging should be disconnected immediately.
    • Failure to fully charge a battery can result in poor performance and a reduction in capacity.
    • These guidelines are intended for typical consumer applications. For military, commercial applications or new equipment design, please contact OPTIMA for additional technical information and assistance