When you're sorting through marine electrical batteries and lighting, the battery choice comes down to a fundamental split: do you need a hard burst to start a motor, or do you need steady power that lasts? The Redodo 12V 20Ah LiFePO4 Lithium Marine Cranking Battery and the 12V 60Ah LiFePO4 Lithium Battery, Deep Cycle, Perfect for RV, Marine both use lithium iron phosphate chemistry, but they're aimed at different jobs. We'll compare what each battery actually delivers so you can pick the one that matches your boat's routine.
Quick verdict
If your days on the water revolve around trolling, camping, running accessories, or RV loads, the 12V 60Ah deep-cycle battery is the better buy. It costs $109.99, offers three times the amp hours of the Redodo, and covers marine, RV, camping, backup, and home roles. If your main concern is a compact marine cranking battery, the Redodo 12V 20Ah at $165.99 fits that role. The $56 gap in the 60Ah's favor makes that choice even easier when you're not starting a demanding outboard.
At a glance
| Product | Price | Capacity | Best role |
|---|---|---|---|
| Redodo 12V 20Ah LiFePO4 Lithium Marine Cranking Battery | $165.99 | 20Ah | Compact starting battery for outboards and tight marine compartments |
| 12V 60Ah LiFePO4 Lithium Battery, Deep Cycle, Perfect for RV, Marine | $109.99 | 60Ah | Deep-cycle power for trolling, RV loads, camping, and backup |
Where each product wins
- Redodo 12V 20Ah: The stronger choice when the job is starting a motor and space is limited. Its Group U1 footprint and IP67 waterproof case fit the damp spots where marine batteries often sit.
- 12V 60Ah deep-cycle: The stronger choice when you need hours of energy for trolling, camping, home backup, RV accessories, or mixed marine loads. Its much larger capacity and broad application fit give it the versatility edge.
Product notes
Redodo 12V 20Ah Marine Cranking Battery
This one earns its place with a narrow but important job: giving a boat a dependable start. The Group U1 footprint and IP67 waterproof case let it sit in a small, damp compartment without feeling oversized. It uses a 4-cell LiFePO4 construction, and it's aimed at trolling motor, marine, and kayak use, so it clearly belongs around the water. For anyone whose main battery problem is cranking a demanding outboard, this design is aimed squarely at that moment. The obvious limitation is reservoir size. At 20Ah, it holds far less energy than the deep-cycle option, so it is better at delivering a burst than sustaining long draws. If you also need to run a trolling motor or keep cabin lights on for hours, you'll be pairing it with a house battery rather than relying on it alone.
12V 60Ah Deep-Cycle Battery
This is the battery for the long haul. The deep-cycle design gives it a much larger energy reservoir, and its 768Wh rating and 50A BMS let it feed steady power to trolling motors, small appliances, lights, and camping gear. Its application range also covers backup power and home/garden alongside marine and RV, which makes it a flexible pack for a boat or a van. If your plan is to power several loads over a day rather than start one motor, the capacity here is the strongest argument for it. The limitation is the flip side: this battery is positioned as deep-cycle, so it is intended for steady discharge rather than starting bursts. Its maximum continuous discharge current of 30A reinforces that role. If you need both starting and sustained power, partnering it with a separate starting battery is the more realistic setup.
Final choice by use case
- Starting an outboard from a compact pack: Go with the Redodo 12V 20Ah Marine Cranking Battery.
- Powering trolling motors, RV accessories, camping gear, or backup loads: Go with the 12V 60Ah Deep-Cycle Battery.
- Mixed use with one battery: The 60Ah deep-cycle gives you far more usable energy for sustained jobs. Treat it as the house battery in your setup, and keep a dedicated starting battery in mind if your engine needs a strong crank.
