The Lithium Pros TM133 is a battery pack with a nominal voltage of 12V, as the specification block states it and a nominal capacity of 33Ah, as the specification block states it.
Last updated: 16 September 2026
Battery and charging
- Voltage
- 12V, as the specification block states it
- Nominal capacity
- 33Ah, as the specification block states it
- Reserve minutes, at the maker's stated motor setting
- 65 minutes, which they put at 30% over a U1 lead-acid
- Stated energy
- 422 Whr — and 12.8 x 33 gives 422.4
“12V 33Ah (422 Whr) 65 Reserve Minutes BCI Group U1 size, 7.75"x5.12x6.37" 10 lbs”
Source: lithiumpros.com/products/tm133-12-8v-33ah-lithium-ion-battery
“12V 33Ah (422 Whr) 65 Reserve Minutes BCI Group U1 size, 7.75"x5.12x6.37" 10 lbs”
Source: lithiumpros.com/products/tm133-12-8v-33ah-lithium-ion-battery
“12V 33Ah (422 Whr) 65 Reserve Minutes BCI Group U1 size, 7.75"x5.12x6.37" 10 lbs”
Source: lithiumpros.com/products/tm133-12-8v-33ah-lithium-ion-battery
“12V 33Ah (422 Whr) 65 Reserve Minutes BCI Group U1 size, 7.75"x5.12x6.37" 10 lbs”
Source: lithiumpros.com/products/tm133-12-8v-33ah-lithium-ion-battery
Size and fit
- Stated weight
- 10 lbs, as the specification block states it
- Group the maker sells it as
- BCI Group U1, in the maker's own words
“12V 33Ah (422 Whr) 65 Reserve Minutes BCI Group U1 size, 7.75"x5.12x6.37" 10 lbs”
Source: lithiumpros.com/products/tm133-12-8v-33ah-lithium-ion-battery
“BCI Group U1 size, 7.75"x5.12x6.37"”
Source: lithiumpros.com/products/tm133-12-8v-33ah-lithium-ion-battery
Devices whose figures this pack does not meet
Neither maker names the other. These devices publish a draw this pack’s own maker does not rate it to deliver continuously. That is a comparison of two documents and not a manufacturer’s refusal — check both against your own equipment before deciding anything.
Minn Kota's manual for this motor asks for at least a 105 amp-hour rating.
Lithium Pros rate the TM133 at 33 amp-hours each, 72 amp-hours short of it.
Minn Kota's website battery guide asks for 110 amp-hours rather than the manual's 105, and they have not reconciled the two; at 33 this pack falls short of both.
Lithium Pros publish a reserve-minute figure for this pack and it names Minn Kota, which is not a statement that the two go together: their footnote assumes a 50% throttle setting on a Minn Kota motor and a 50% duty cycle, so it is a runtime estimate for one motor at one throttle position.
It is not the BCI reserve capacity — minutes at a fixed 25 amps — which is the measure Minn Kota's own requirement refers to, so the two numbers should not be set against each other.
Minn Kota attach a condition to the chemistry that no comparison of capacities can settle: this motor is "specifically designed to run on traditional lead-acid batteries", and "running a Minn Kota trolling motor at speeds higher than 85% for a prolonged period could cause permanent damage to the motor".
On charging they are the other way about — motors and Precision chargers made in 2021 or later carry a lithium profile, and earlier Precision chargers can charge lithium on the AGM setting.
Minn Kota's own battery-guidance page (not the page cited below) also forbids mixing types in such a string: "Do not connect a Lead-Acid and Lithium in a series to create a 24-volt system", which rules out part-upgrading an existing lead-acid set.
Neither company has named the other and nobody has tested the pairing.
- Minn Kota Terrova 80 lb (60" shaft, wireless remote)Figures compared — they do not meetView device: Minn Kota Terrova 80 lb (60" shaft, wireless remote) →
Minn Kota's manual for this motor is explicit that two 12-volt batteries wired in series are required, and their amp-hour figure is asked of the battery rather than of the string. Their battery-guidance table recommends lithium at 100 to 125 amp-hours for an 80 lb motor.
- Minn Kota Terrova 112 lb (60" shaft, CHIRP sonar, wireless remote)Figures compared — they do not meetView device: Minn Kota Terrova 112 lb (60" shaft, CHIRP sonar, wireless remote) →
Minn Kota's manual for this motor is explicit that three 12-volt batteries wired in series are required, and their amp-hour figure is asked of the battery rather than of the string. Their battery-guidance table recommends lithium at 125 to 150 amp-hours for a 112 lb motor.
- Minn Kota Terrova 55 lb (54" shaft, wireless remote)Figures compared — they do not meetView device: Minn Kota Terrova 55 lb (54" shaft, wireless remote) →
Lithium Pros rate the TM133 at 33 amp-hours, 72 amp-hours short of it. 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.
Sources
- Lithium Pros TM133Manufacturer model page
Source: lithiumpros.com/products/tm133-12-8v-33ah-lithium-ion-battery
Retrieved September 16, 2026