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BlueTop Technical Specs


 

OPTIMA STARTING AND DUAL PURPOSE BATTERIES

MODEL NUMBER


D27M


34M


D34M


D31M

PERFORMANCE

Voltage

12V

12V

12V

12V

Cold Cranking Amps BCI @ -18¡ãC

800

800

750

900

Cranking Amps BCI @ 0¡ãC

1000

1000

870

1125

Reserve Capacity (minutes)

140

100

120

155

Capacity (AH, C/20 rate)

66

50

55

75

Internal Resistance (ohms)

0.0025

0.0030

0.0028

0.0025

PHYSICAL SPECS

Length (mm)

309

255

255

325

Width (mm)

172

174

174

166

Height (mm)

221

201

201

238

Weight (kg)

24.4

17.4

19.7

27.1

Post Type

Dual SAE & 5/16" Stainless Stud

BCI Group

27

34

34

31


Product Spec Sheets

For printable product specification sheets, click on your battery choice above. The printable documents provide information on physical characteristics, performance, power, charging and shipping.


Charging Info

The following charging methods are recommended to insure a long battery life (Always use a voltage regulated charger, with voltage limits set as described below):

BlueTop Type: BT 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.

Battery charger:
13.8 to 15.0 volts, 10 amps maximum, 6-12 hours approximate.

Rapid Recharge:

Maximum voltage 15.6 volts (regulated).
Maximum current: No limit as long as temperature <50¡ãC (125¡ãF).
Maximum recharge time: Charge until current drops below 1 amp.

Float charge:
13.2 to 13.8 volts, 1 amp maximum current, time indefinite (at lower voltage).
All limits must be strictly adhered to.

Blue Top Type: BT D27 & D31

These batteries are dual purpose. They are designed for engine starting and deep cycling applications and for use in boats 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.

Cyclic Applications:
14.7 volts, no current limit as long as battery temperature remains below 50¡ãC (125¡ãF). When current falls below 1 amp, finish with 2 amp constant current for 1 hour for BT D34 and 3 amp constant current for 1 hour for BT D27.

Rapid Recharge:
Maximum voltage 15.6 volts (regulated).
Maximum current: No limit as long as temperature <50¡ãC (125¡ãF).
Maximum recharge time: Charge until current drops below 1 amp.

Float charge:
13.2 to 13.8 volts, 1 amp maximum current, time indefinite (at lower voltage).
All limits must be strictly adhered to.

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