The Renogy Mini Size 12V 20Ah Trolling Motor Battery Is a Light, Drop-In Lithium Upgrade for Small 12V Gear
The Renogy Mini Size 12V 20Ah Trolling Motor Lithium Iron Phosphate Battery replaces a 20Ah lead-acid battery at about half the weight. It stores 256Wh of energy, delivers about 30% more usable capacity per charge than lead-acid and is rated for 4,000 cycles at 80% depth of discharge. It weighs 5.95 lbs and measures just 7.13 x 3.03 x 6.61 inches.
The battery is built for small 12V loads that get carried around and exposed to the weather: kayak and small-boat trolling motors, fish finders, electric scooters, ham radio kits for portable operation, game cameras and similar devices. An IP65 rating keeps out dust and water jets, and a built-in battery management system guards against overcharge, over-discharge, overcurrent, short circuits and charging in freezing temperatures.
Renogy Mini Size 12V 20Ah Battery Features
Half the Weight of Lead-Acid
At 5.95 lbs, the battery is easy to carry from the truck to the dock, down a trail or into a pack. Lithium iron phosphate chemistry delivers more of its rated capacity than a lead-acid battery of the same size, which is where the extra runtime comes from.
4,000 Cycle Rated Life
Renogy rates the battery for 4,000 cycles at 80% depth of discharge, about eight times the lifespan of a typical lead-acid battery. For a battery that gets used every weekend, that means years of service before it needs replacing.
Built-In Battery Management System
More than 20 BMS protections watch voltage, current and temperature. The battery disconnects itself if it is overcharged, drained too far, shorted or overloaded, and it blocks charging below 32°F to protect the cells.
IP65 Water and Dust Resistance
The sealed case handles spray, rain, sand and dust, so the battery can ride in a kayak, a jon boat or a scooter deck without a separate box.
Drop-In Replacement
The battery uses standard M6 terminal bolts and fits where a 20Ah lead-acid battery sits now. Remove the old battery, connect the leads and go.
Optional App Monitoring
The battery has no Bluetooth of its own. Add a Renogy 300A Battery Shunt (sold separately) to see voltage, current and state of charge in the Renogy app.
Real-World Applications
Kayak and small-boat trolling motors. Light weight and IP65 protection suit small transom-mount motors on kayaks, canoes and jon boats.
Fish finders and marine electronics. Power a sonar unit, GPS or livewell pump all day from a battery that weighs less than the tackle box.
Ham radio in the field. Run a mobile or portable rig for POTA and SOTA activations without hauling a heavy lead-acid battery.
Scooters, carts and small gear. Replace sealed lead-acid batteries in mobility scooters, kids' ride-ons, feeders, sprayers and game cameras.
How It Compares to Common Alternatives
Versus a 20Ah sealed lead-acid battery. Lead-acid costs less up front but weighs about twice as much, delivers less usable capacity and wears out far sooner. Over its life, lithium usually costs less per cycle.
Versus a larger 12V 100Ah battery. A 100Ah battery runs a full-size trolling motor or RV loads for much longer, but it weighs several times more. The 20Ah size is the better pick for small motors, electronics and anything you carry.
Versus portable power banks. Power banks add outlets and USB ports, but most are not built to sit in a wet boat or connect directly to a 12V motor. This battery is the simpler, more rugged choice for direct 12V use.
Is This Battery the Right Fit
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Load current. Up to 20A continuous and 75A for 5 seconds. Small trolling motors that pull more than 20A on high speed need a larger battery.
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Charger. Use a lithium (LiFePO4) charger. A 10A charger fills the battery in about 2 hours.
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Temperature. Charges from 32°F to 131°F and discharges from -4°F to 140°F.
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Expansion. Up to 16 identical batteries can be wired in series and parallel, for up to 4.096kWh.
This may be a good fit if
- You want to replace a heavy 20Ah lead-acid battery
- You run a kayak motor, fish finder, radio or other small 12V load
- Your battery will see water, dust or rough handling
- You want a battery that lasts thousands of cycles
Common Questions
Can I Replace My Lead-Acid Battery With This One?
In most cases, yes. Confirm that your device and its charger work with lithium iron phosphate batteries before you switch.
Does It Have Bluetooth?
No. For app monitoring, pair it with a Renogy 300A Battery Shunt, sold separately.
How Long Does It Take to Charge?
Charging time depends on the charger. With a 10A lithium charger, a full charge takes about 2 hours.
How Much Clearance Does It Need?
Renogy recommends leaving 1.97 to 3.94 inches (50 to 100 mm) above the battery and at least 7.87 inches (200 mm) on the terminal side.
What's Included
- 1 x Renogy 12V 20Ah Lithium Iron Phosphate Battery
- 2 x Terminal Bolts (M6 x 1.25 x 10 mm)
- 1 x User Manual
Light, Long-Lasting Power for Small 12V Gear
The Renogy Mini Size 12V 20Ah Trolling Motor Battery gives kayakers, anglers, radio operators and anyone running small 12V equipment a lighter battery that lasts far longer than lead-acid. At Outbound Power, we help customers choose the right battery and charger for the job. If you have questions, our team is happy to help.
Renogy Mini Size 12V 20Ah Battery Specifications
|
| Model |
RBT1220LFP-TM-US |
| Chemistry |
Lithium iron phosphate (LiFePO4) |
| Nominal Voltage |
12V |
| Rated Capacity |
20Ah (0.5C, 25°C) |
| Energy |
256Wh |
| Cycle Life |
4,000 cycles at 80% DOD (0.5C, 25°C) |
| Voltage Range |
10V to 14.8V |
| Max Continuous Charge Current |
20A |
| Max Continuous Discharge Current |
20A |
| Peak Discharge Current |
75A for 5 seconds |
| Charge Temperature Range |
32°F to 131°F (0°C to 55°C) |
| Discharge Temperature Range |
-4°F to 140°F (-20°C to 60°C) |
| Storage Temperature Range |
-4°F to 140°F (-20°C to 60°C) |
| Operating Humidity |
10% to 95% |
| Max Batteries in Series and Parallel |
16 (up to 4.096kWh) |
| Dimensions (L x W x H) |
7.13 x 3.03 x 6.61 in (181 x 77 x 168 mm) |
| Weight |
5.95 lbs (2.7 kg) |
| Terminal Bolt Size |
M6 x 1.25 x 10 mm |
| Protection Rating |
IP65 |
| Bluetooth |
No (optional Renogy 300A Battery Shunt) |
| Certifications |
MSDS, UN38.3, FCC, CE, PSE, RCM, IC, RoHS, UKCA |
| Warranty |
5-year material warranty |
Renogy Mini Size 12V 20Ah Battery Manual
