Trojan Battery Company 31XCS — 12V Battery Specs

Battery and charging

Battery chemistry: Lead Acid
Reserve minutes, at a stated current: 185 minutes at 25 amps — the only capacity-like figure published
Capacity, which the maker prints as not applicable: Trojan print N/A — no capacity at any rate, and no watt-hours
Battery weight: 58.5 (26.5)
Voltage: 12V
Reserve capacity: 185

Battery care and safety

Storing it through a cold winter: Below freezing, keep it above 60% charge
Operating temperature range: -40°F to 140°F (-40°C to 60°C). At temperatures below 32°F (0°C) maintain a state of charge greater than 60%.

Size and fit

Length: 329 mm
Width: 173 mm
Height: 236 mm
Terminals: Stud Terminal ST

Devices documented to run on this

The figures below line up. Neither manufacturer states that this pack runs this device — that is our reading of what each of them published separately, not a claim by either of them or a test by us. Even where every stated figure agrees, these can still decide it:

The device’s published draw is usually a peak, not the load it holds — the two numbers are not the same kind of quantity
A maker’s amp-hour minimum and their reserve-capacity minimum can give different answers about the same battery
Conditions attached to the chemistry, such as a speed limit for running on lithium
Whether the pack may be wired in series at all, where the device needs 24 or 36 volts
The charger, which both makers put conditions on and neither supplies
Case size, hold-down and terminal type — fitting the space is not being secured in it

Worth confirming with the device's manufacturer or a dealer before buying.

Trojan publish no amp-hour capacity for the 31XCS at all — its panel reads "Capacity Amp-Hours N/A" where every other battery in the line prints four figures.

Minn Kota cover exactly that case: where no amp-hour rating is available they ask for a deep cycle battery with at least 180 minutes of reserve capacity.

Trojan give 185 minutes at 25 amps, clearing it by 5 minutes.

Neither company has named the other and nobody has tested the pairing.

Their amp-hour figure is asked of the battery rather than of the string, so it is compared against a single one.

Source: trojanbattery.com/products/31xcs-12v-flooded-lead-acid-battery

Minn Kota Terrova 55 lb (54" shaft, wireless remote)Figures comparedView device: Minn Kota Terrova 55 lb (54" shaft, wireless remote) →
One of these.
Only on reserve capacity, which is the measure Minn Kota name where no amp-hour rating is published — check yours before buying.
Minn Kota state this motor draws up to 50 amps, and Trojan publish nothing at a current that high, so the reserve figure answers their requirement without describing what the battery does under this motor's load. Minn Kota's battery-guidance table recommends AGM or lithium at 100 amp-hours for a 55 lb motor, alongside the manual sentence quoted above.
Minn Kota Terrova 80 lb (60" shaft, wireless remote)Figures comparedView device: Minn Kota Terrova 80 lb (60" shaft, wireless remote) →
Two of these, Two 12-volt batteries wired in series.
Only on reserve capacity, which is the measure Minn Kota name where no amp-hour rating is published, and with two of these wired in series as their manual requires — check yours before buying.
Minn Kota state this motor draws up to 56 amps, and Trojan publish nothing at a current that high, so the reserve figure answers their requirement without describing what the battery does under this motor's load. Minn Kota's manual for this motor is explicit that two 12-volt batteries wired in series are required. Their battery-guidance table recommends lithium at 100 to 125 amp-hours for an 80 lb motor, which is a different chemistry from this one — the manual and the table are both Minn Kota's and they do not agree.
Minn Kota Terrova 112 lb (60" shaft, CHIRP sonar, wireless remote)Figures comparedView device: Minn Kota Terrova 112 lb (60" shaft, CHIRP sonar, wireless remote) →
Three of these, Three 12-volt batteries wired in series.
Only on reserve capacity, which is the measure Minn Kota name where no amp-hour rating is published, and with three of these wired in series as their manual requires — check yours before buying.
Minn Kota state this motor draws up to 52 amps, and Trojan publish nothing at a current that high, so the reserve figure answers their requirement without describing what the battery does under this motor's load. Minn Kota's manual for this motor is explicit that three 12-volt batteries wired in series are required. Their battery-guidance table recommends lithium at 125 to 150 amp-hours for a 112 lb motor, which is a different chemistry from this one — the manual and the table are both Minn Kota's and they do not agree.

Do not charge with

The manufacturer states these chargers must not be used with this battery:

PD4500LI Series Power Control CenterStated incompatibleView charger: PD4500LI Series Power Control Center →
Progressive Dynamics state it outright about this converter: "The 4500LI series converter/chargers are designed to recharge lithium iron phosphate (LiFePO4) batteries only. DO NOT USE TO RECHARGE LEAD/ACID BATTERIES!" This pack is Flooded lead-acid, which is a lead-acid chemistry, so their sentence covers it. They say nothing about packs of other chemistries and nothing here extends it past what it covers.
Source: forestriverinc.com/files/component-manuals/Electrical/Progressive Dynamics - Power Converter Model PD4500 Series Operation Guide.pdf

Sources

Trojan 31XCSManufacturer model page
Source: trojanbattery.com/products/31xcs-12v-flooded-lead-acid-battery
Retrieved September 16, 2026
Progressive Dynamics PD4500 Series Operation GuideManufacturer document
Progressive Dynamics
Source: forestriverinc.com/files/component-manuals/Electrical/Progressive Dynamics - Power Converter Model PD4500 Series Operation Guide.pdf
Retrieved September 20, 2026