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Battery School

General Battery Care Procedures

General deep cycle battery care procedures

Reasons Why Batteries Fail

General Difference Between Gel and Wet Batteries

State of Charge and Sulfation

Connect Your Batteries for Optimum Efficiency

Just A Little Corrosion Causes Big Voltage Drops

Don't Be Misled By Battery Ratings

Which Deep Cycle Battery Do I Choose?

Below is a table showing the specifications of popular Centennial and Batteries Northwest wet-lead acid, deep cycle batteries and some Trojan group sizes also.  Measurements are “overall dimensions” and therefore include any handles, ridges, etc.

GROUP SIZE CCA(0 deg) RES. CAP / WEIGHT 20 HR. CAPACITY DIMENSIONS
Length Width Height
DP24(CEN) 550 125/41 85 11 1/4 6 3/4 9 3/4
DC24(CEN) 600 150/46 87 11 1/4 6 3/4 9 3/4
DC2 (CEN) 650 160/52 105 12 3/4 6 3/4 9 3/4
DC31MF(CEN) 800  225/61 135 13 1/4 6 13/16 9 1/4
B2200 (BatNW)* 500 220/63 225 10 3/8 7 1/8 11 3/16
B24DC(BatNW) 600 110/41 80 11 1/4 6 3 /4  9 3/4
B27DC(BatNW)  650 145/52  87 12 3/4 6 3/4 9 3/4
SCS150(Trogan) ----- 150/50 100 11 1/4 6 3/4 9 3/4
SCS200(Trojan) ----- 200/60 115 12 3/4 6 3/4 9 3/4
SCS225(Trojan) ----- 225/66 130 14 6 3/4 9 3/4
T-105(Trojan)* ----- 447/62 225  10 3/8 7 1/8 10 7/8
T-125(Trojan)* ----- 488/66 235 10 3/8 7 1/8  10 7/8
T-145(Trojan)* -----  530/72   260 10 3/8 7 1/8  11 5/8
*Please note that these are 6 Volt batteries and two of them, connected in series, are required to produce 12 volts.

The deep cycle batteries shown above have plate designs that consist of a higher density active material than standard automotive batteries.  This higher density material enables the plates to withstand the stresses of repetitive cycling better. 

The grid alloy in a deep cycle is specially formulated to increase the active material adhesion to the grid thereby providing additional protection against the stresses and abuses of cycling and vibration.

One significant advantage of using the grid alloy (antimony) in deep cycle batteries is that it allows the user to cycle(discharge and recharge) the battery over 250 to 2200 cycles, depending on the type and depth of cycle.   One disadvantage is that while “extra” cycling is enhanced, this battery gasses more and water levels must be checked routinely. The atimoney alloy also increases the “self-discharge rate” when compared to automotive, absorbed glass mat (AGM) or gel batteries.

The Plates designed for GC2200, T-105 , T-125 and T-145 use the same active material and alloy of the other deep cycle batteries but both negative and positive plates are up to 60% thicker than those found in a 24DC or 27DC. The significance of this is that these 6 Volt batteries should have life span up to 60 to 70% longer than the other batteries listed.

Daily Amphere-Hour Consumption For Your RV

Safety Tips on Charging Batteries

Determining When A Battery is Fully Charged

Why Are My Batteries Discharged

What is the difference between series battery connections and parallel battery connections and how do they increase battery capacity and voltage?

Jump start procedures

Preparing your batteries for winter

Advantages and Disadvantages of using two 12 volt batteries connected in parallel or two 6 volt batteries connected in series.

Testing the battery