Odyssey 34M-PC1500 Trolling Thunder Marine Dual Purpose Battery is BCI Group Size 34 battery. It is truly dual purpose battery combining good starting power and deep cycling capabilities. Odyssey 34M-PC1500 Marine Dual Purpose Battery is very similar to Odyssey 34-PC1500, Odyssey 34R-PC1500, Odyssey 34/78-PC1500 and Odyssey 78-PC1500 batteries. All these batteries are very similar and are suitable for various roles, and can be used as starting/cranking battery, trolling motor battery, electric vehicle battery etc.
Odyssey 34M-PC1500 Features and Specifications
Odyssey 34M-PC1500 marine battery is AGM (Absorbed Glass Mat) type of battery. It uses pure led (99.99%) as plate material and it is rather densely packed unit.
It is maintenance free, sealed lead acid (SLA) battery - there is no need to add water during its life time and it can operate in any position. It is even classified as a non-spillable battery by US Department of Transportation.
Odyssey 34M-PC1500 is rather robust battery - it is designed to be vibration and impact resistant, but don't hit it with a hammer to test that, at least not miles off the shore :)
Battery has wide temperature range of operation - from -40°F (-40°C) to 176°F (80°C). Of course, maximum cranking amps and its capacity changes according to the temperature.
Odyssey 34M-PC1500 specifications are given in the following table:
|Nominal Voltage||12 V|
|5 sec Current||1500 A|
|Nominal Capacity (20h)||68 Ah|
|10h Capacity||62 Ah|
|Reserve Capacity||135 min|
|Dimensions (LxWxH)||10.86x6.77x7.95 inches (~27.6x17.2x20.2 cm)|
|Weight||49.5 lbs (22.4 kg)|
|Terminals||SAE and 3/8” Stud (Pos.), 5/16” Stud (Neg.)|
|Internal Resistance||2.5 mΩ|
|Short Circuit Current||3100 A|
Odyssey 34M-PC1500 is a true dual purpose battery. As starting battery, it can safely provide 850 Amps at 0°F (-18°C), 1050 Amps at 32°F (0°C) and 1250 Amps at 80°F (27°C).
Note: Odyssey 34M-PC1500 CCA value on the official Odyssey site is 850 Amps, while the value on the casing is 880 Amps. Since there are several group 34 Odyssey batteries with the same (or almost the same) internal design with 850 Amps CCA, we tend to believe that 850 Amps is the correct value. After all, it is better and safer to assume lower value.
Maximum allowed 5 sec current is 1500 Amps - hence the name 34M-PC1500: '34' is BCI Group, 'M' stands for 'Marine' application and 'PC1500' stands for 'Pulse Current', which is 1500 Amps for 5 seconds.
Due to low internal resistance of 2.5 mΩ, fully charged battery has short circuit current of around 3100 Amps. This is serious current which can easily melt or weld any metal object which has, for example, accidentally fallen on the battery and has made a short circuit ...
Nominal capacity of the battery is 68 Ah - it means that battery can provide 3.4 Amps for 20 hours. 10h capacity is lower - 62 Ah, meaning that battery can provide 6.2 Amps for 10 hours.
Reserve capacity of the battery is 135 minutes - meaning that a new, fully charged, Odyssey 34M-PC1500 battery can deliver 25A current and maintain at least 10.5V of voltage at 80°F (~25°C).
To preserve battery operating life, it is highly recommended not to discharge the battery lower than 20% of its capacity - this battery is designed to withstand at least 400 charge-discharge cycles down to 20% of its capacity. Although this is dual purpose battery, discharging the battery down to, for example, 50% of its capacity, will prolong the battery life and increase its number of charge-discharge cycles.
Odyssey BCI Group 34 Batteries
Odyssey batteries includes several 34 size batteries. Internally, they are practically the same and have the same electrical characteristics.
Externally, there are few differences, mainly in type and position of battery terminals:
- Odyssey 34M-PC1500: SAE and 3/8” Stud (Positive), 5/16” Stud (Negative).
- Odyssey 34-PC1500: SAE only terminals
- Odyssey 34R-PC1500: SAE, but note that the right terminal is positive. This is actually Odyssey 34-PC1500 with the terminals reversed.
- Odyssey 34/78-PC1500: top terminals are SAE, while side terminals are 3/8” receptacle.
- Odyssey 78-PC1500: side only terminals, 3/8” receptacle.
Odyssey BCI Group 34 batteries are all AGM SLA, dual purpose batteries, suitable for various applications, including marine applications, in cars, trucks and other vehicles, commercial applications, etc.
Odyssey 34M-PC1500, Exide Edge FP-AGM24DP, Optima D27M, Trojan SCS150 Batteries Comparison
Comparison of the lead acid batteries of the similar weight is given in the following table:
|Model||Battery Type||Goup Size||Cell Type||Ah||MCA||RC||Weight (lbs/kg)|
|Exide Edge FP-AGM24DP||Dual Purpose||24||AGM||75||930||145||50 lbs; 22.7 kg|
|Odyssey 34M-PC1500||Dual Purpose||34||AGM||68||1050||135||49.5 lbs; 22.4 kg|
|Optima 8027-127 D27M||Dual Purpose||27||AGM||66||1000||140||54 lbs; 24.5 kg|
|Trojan SCS150||Deep Cycle||24||Flooded Cell||100||650||150||50 lbs; 22.6 kg|
Note: links in the table are Amazon affiliate links, they open in the new windows. Price of these batteries? Well, prices are very similar and they often depend on which battery can be found on sale at the moment - check Amazon links in the table above for current prices of these batteries.
These batteries belong to various BCI battery groups, but their weight is, IMHO, more important.
Trojan SCS150 battery is deep cycle, flooded cell battery, while other batteries are dual purpose, AGM SLA batteries. Although flooded cell batteries are not recommended for general marine use, flooded cell batteries are not dead for several reasons like price and performance.
Trojan SCS150 battery weighs practically just like Exide Edge FP-AGM24DP and Odyssey 34M-PC1500 and it is the worst cranking battery in this battery comparison.
However, as discharging currents are decreased, Trojan SCS150 starts to show its strength - it has the best Reserve Capacity value of 150 minutes (25 Amps), slightly better than Exide Edge FP-AGM24DP. But, when being discharged for 20 hours, Trojan SCS150 is the best by far.
Optima 8027-127 D27M is some 4.5 pounds heavier than Odyssey 34M battery, has 5 minutes longer reserve capacity, almost the same (but slightly lower) 20h capacity and almost the same (but slightly lower) MCA rating.
Exide Edge FP-AGM24DP battery weighs half a pound more than Odyssey 34M battery, has lower MCA rating (120 Amps difference), but it has batter RC rating (10 minutes difference). Also, when being slowly discharged, Exide Edge FP-AGM24DP performs better - 20h capacity is 7 Ah larger.
Long story short - Odyssey 34M-PC1500 is better cranking battery than Exide Edge FP-AGM24DP and Optima D27M BlueTop batteries. It has somewhat smaller RC rating than these two batteries, but it is better 20h performer than Optima D27M BlueTop battery. If you have trolling motor which draws 25 Amps, Exide Edge is the best choice of these 3 AGM batteries - as trolling motor battery, Trojan SCS150 battery is the best battery of these 4 batteries, as long as the current is less than 25 Amps. But SCS150 is 'Flooded Cell' type of battery and personally, not recommended as such, especially on smaller boats.. However, most trolling motors draw more than 25 Amps and it is perhaps better to have battery which can provide more power for shorter period of time. Again, this highly depends on fishing conditions and driving habits of the electric motor user!
For more reviews and recommendations, check Odyssey 34M-PC1500ST TROLLING Thunder Marine Dual Purpose Battery Amazon link (link opens in the new window).