Redodo 12V 100Ah LiFePO4 Lithium Battery with 20Ah Marine Cranking Battery, 1280Wh Energy Storage, 800A CCA for Outboard Motor, 1280Wh for Solar RV Marine Boat Energy Storage

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Disclosure: As an Amazon Associate, I earn from qualifying purchases.

Quick Verdict — Redodo 12V 100Ah LiFePO4

Redodo 12V 100Ah LiFePO4 is a practical dual‑battery bundle combining a 100Ah deep‑cycle LiFePO4 and a 20Ah 800CCA starter for marine use, currently priced at $374.99 (Only left in stock).

Amazon data shows the listing (ASIN B0FP31BRMP) is active and customer reviews indicate buyers appreciate the weight savings and reliable starting power. Based on verified buyer feedback, we recommend this pack for small‑to‑mid sized boats, anglers using trolling motors, and RV owners who need compact 12V storage.

Who should buy: If you want a space‑saving 12V energy bank plus a dedicated starter for outboard motors, this bundle is worth considering; if you need a heavy‑duty automotive starter for big inboards, look elsewhere.

Product Overview & What’s in the Box — Redodo 12V 100Ah LiFePO4

What’s included: one 12V 100Ah LiFePO4 deep‑cycle battery and one 12V 20Ah marine cranking battery (800A CCA). Note: items may ship separately and can arrive at different times.

Key specs at a glance: 1280Wh (100Ah × 12.8V nominal) energy, 800A CCA for the 20Ah starter, IP67 for the 20Ah starter, IP65 for the 100Ah house battery, and BMS protection on both units.

Certifications & protections: the product description lists ABYC compliance and certifications including FCC, CE, RoHS, and UN38.3; verify details and warranty on the manufacturer page at redodo.com and the Amazon listing at amazon.com/dp/B0FP31BRMP.

Expansion & weight advantage: the 100Ah battery supports series/parallel expansion up to 4S4P (48V/400Ah) so you can scale for larger systems. Compared with lead‑acid, the LiFePO4 units are significantly lighter and offer more usable capacity per weight.

Full Specifications Table

Below is a concise specs table to compare at a glance. Price and availability are listed next to the main specs for quick reference.

Price: $374.99 — Only left in stock (Amazon).

• Nominal voltage: 12.8V
• Capacity: 100Ah (deep cycle) + 20Ah (starter)
• Energy: 1280Wh (100Ah × 12.8V nominal)
• CCA: 800A (20Ah starter)
• Cycle life: claimed 4,000–15,000 cycles (manufacturer range)
• IP ratings: 100Ah IP65, 20Ah IP67
• Certifications: ABYC (claimed), FCC, CE, RoHS, UN38.3
• Charge/discharge rates: compatible with solar, alternator, generator and LiFePO4 chargers; supports series/parallel up to 4S4P
• Compatibility: solar panels, alternators (with proper settings), LiFePO4 chargers; note product warns against use with certain Yamaha motors and larger automotive starters
• Shipping/packaging note: items may arrive separately — plan for staggered delivery

If you want to confirm any spec or warranty item, check the manufacturer product page at redodo.com and the Amazon product detail page here.

Key Features Deep-Dive: Redodo 12V 100Ah LiFePO4

We looked closely at the core tech: automotive‑grade LiFePO4 cells and a built‑in BMS that claims protection across the usual failure modes. Customer reviews indicate that the battery’s BMS does a good job protecting against over/under voltage and overcurrent, but that charging profile compatibility matters in real installations.

Cycle life claims: the manufacturer states 4,000–15,000 cycles — that wide range reflects different discharge depths and C‑rates. In practice, we expect several thousand cycles at moderate depth‑of‑discharge in usage scenarios.

Marine compliance: ABYC compliance is claimed and Amazon data shows buyers specifically chose this bundle for boat installations because of the IP ratings and BMS protections. Below we unpack chemistry, starting performance, and the marine durability specs that matter most.

Battery Chemistry & Longevity

Why LiFePO4? LiFePO4 chemistry offers superior thermal and chemical stability compared with AGM/flooded lead‑acid, plus much lower self‑discharge and higher cycle life. The Redodo 100Ah claims 4,000–15,000 cycles; by contrast, typical AGM batteries are rated for a few hundred to ~1,000 cycles at similar depths of discharge.

Actionable steps to maximize lifespan:

1. Charge window: keep float around 13.6–13.8V when possible and bulk charge at ~14.2–14.6V only as the manufacturer recommends.
2. C‑rate limits: avoid continuous high C discharge; keep discharge below the battery’s continuous rating (see manufacturer specs) for best longevity.
3. Storage SOC: store around 50–70% state of charge for long‑term storage; recharge every 3–6 months if not used.

Data points to remember: the pack offers 1280Wh energy and supports series/parallel expansion up to 4S4P for larger systems. Based on verified buyer feedback, most shoppers report several years of trouble‑free cycling when using proper chargers and avoiding deep continuous high‑C draws.

Starting Performance & Cranking Capability

The 12V 20Ah starter battery is rated at 800A CCA, which pairs with the 100Ah house bank to provide reliable outboard starts. Customer reviews indicate reliable engine cranking even after multiple starts when wired correctly.

Wiring and setup advice:

1. Separate circuits: wire the starter battery dedicated to the engine starter and keep the 100Ah as the house bank powering electronics and trolling motors.
2. Isolator/combiner: use an automatic battery isolator or a DC‑DC combiner to charge both batteries from the alternator without draining your starter bank while cranking.
3. Fusing: fuse each battery at the battery terminal with an appropriately rated ANL or inline fuse sized just above expected continuous current, and use a separate fuse for the starter circuit sized for the starter draw.

Testing plan we recommend: perform cold starts, repeated cranks, and long trolling runs to confirm no BMS trips. Based on specs and verified buyer feedback, expect reliable starts for small outboards but not for large diesel starters.

Marine Durability & Safety Features

The 20Ah starter is IP67 rated and the 100Ah house battery is IP65 rated — that difference matters onboard. IP67 means the starter can survive temporary immersion, while IP65 means the house battery is protected against jets of water and spray but not immersion.

Practical expectations aboard small boats and RIBs:

• Salt spray: both units claim resistance to salt spray and vibration; still, mount the IP65 100Ah in a dry, sheltered compartment to avoid direct spray.
• Vibration and shock: the batteries use automotive‑grade prismatic cells and claim enhanced vibration resistance; secure mounting and rubber isolators reduce mechanical stress.
• Certifications: ABYC compliance plus FCC, CE, RoHS, and UN38.3 listed in the product data — these certifications help with transport and regulatory acceptance for marine use.

Installation checklist:

1. Mounting: bolt to a flat surface using anti‑vibration pads and stainless hardware.
2. Ventilation: LiFePO4 does not need ventilation like flooded lead‑acid, but keep access for inspection.
3. Cable sizes: use appropriately sized marine battery cable (e.g.,/0 to/0 AWG for high‑amp starter runs, 4–2 AWG for house circuits depending on distance).

What Customers Are Saying — Real Feedback Analysis

Customer reviews indicate a consistent pattern: buyers praise the weight savings and practical starter + house combination, while a minority flag shipping timing and charging nuances. Based on verified buyer feedback, installation success heavily depends on using LiFePO4‑compatible charging sources.

Amazon data shows many shoppers purchased this pack for trolling motors and small outboards. The most common praise and complaints we synthesized from verified buyers are listed below.

Top praise points:

1. Lightweight and compact compared to equivalent lead‑acid banks.
2. Reliable starts for outboard engines where 800CCA is sufficient.
3. Good usable capacity (1280Wh) for trolling motors and electronics.
4. Built‑in BMS gives buyers peace of mind for safety and protection.
5. At $374.99, well priced for a bundled starter + house battery solution.

Top recurring issues:

1. Items arriving separately causing timing headaches for installers.
2. Some users reporting BMS trips when alternator/charger profiles are not LiFePO4‑friendly.
3. 100Ah IP65 is not submersible — buyers expecting full immersion durability were disappointed.
4. Missing mounting hardware meant extra purchases for secure installation.
5. Warnings about incompatibility with certain Yamaha motors — check vehicle/motor compatibility.

Pros — Why Buy This Battery

We summarize the clear strengths you get when choosing this Redodo 12V 100Ah LiFePO4 bundle:

• Combined functionality: 100Ah deep cycle + 20Ah 800CCA starter in one package saves shopping and tuning separate components.
• Energy and cycle life: 1280Wh usable energy with claimed 4,000–15,000 cycles — favorable lifecycle economics if you cycle daily.
• Marine protections: BMS, ABYC compliance claims, and IP67/IP65 ratings make this aimed at boaters.
• Weight/space savings: LiFePO4 offers much higher usable capacity per pound than flooded or AGM lead‑acid alternatives.
• Price point: at $374.99 for the bundle, Amazon data shows this is competitively priced versus buying separate starter and deep‑cycle LiFePO4 units.

Best use: small‑to‑mid sized boats, anglers with trolling motors, and RV owners who want compact 12V energy and a dedicated starter battery.

Cons — What Could Be Better

No product is perfect. Here are the downside considerations for the Redodo 12V 100Ah LiFePO4 bundle.

• Staggered shipping: items may ship separately which creates installation scheduling issues.
• IP rating mismatch: the 100Ah is IP65 — protect it from immersion and persistent spray; the 20Ah starter is IP67 and is more tolerant.
• Starter limits: 20Ah/800CCA is adequate for many outboards but not designed for large inboard diesels or high‑draw automotive starters.
• Accessory gaps: no isolator, combiner, or mounting bolts included — budget for those extras.
• Charging compatibility: incorrect alternator or charger settings can trigger BMS protective behavior; some buyers reported initial BMS trips.

Mitigations we recommend: use a DC‑DC battery combiner or LiFePO4‑compatible charger, install correctly sized fuses, and keep the 100Ah in a sheltered locker to avoid water immersion.

Who This Is For (and Who Shouldn’t Buy)

Good fit: small‑to‑mid sized boat owners, anglers using trolling motors, solar/RV owners who want a compact 12V house bank and a dedicated starter, and DIYers who may expand to series/parallel up to 4S4P.

Not a fit: owners who need batteries for large inboard diesel engines, golf carts, tractors, or specific branded motors the listing warns against (e.g., some Yamaha models). If your starter requires sustained >800CCA draws, choose a larger dedicated starter battery.

Decision checklist (3 steps):

1. Check your starter current requirement: if your outboard needs ≤800CCA, this starter may work; otherwise upgrade.
2. Evaluate charging sources: confirm your alternator or charger supports LiFePO4 or plan to use a DC‑DC charger/combiner.
3. Confirm space/weight benefits: if weight/space savings matter, this pack usually wins versus lead‑acid at similar usable Wh.

Installation, Charging & Maintenance Tips

Follow these step‑by‑step instructions to avoid common problems and extend battery life.

1. Pre‑checks: Inspect for shipping damage and confirm both items arrived; record serial numbers and take photos for warranty registration.
2. Mounting: bolt the units to a flat surface using anti‑vibration pads; keep the IP65 100Ah out of direct immersion zones.
3. Wiring & fusing: use appropriately sized marine cable (2/0 or/0 for starter runs if distance and current demand require it), fuse at the battery with ANL or similar sized slightly above expected continuous current.
4. Charging setup: use a LiFePO4‑compatible charger or a DC‑DC alternator combiner and set alternator voltage per the manufacturer (typical bulk ~14.2–14.6V, float 13.6–13.8V). Avoid constant high float voltages used for lead‑acid.
5. Monitoring & maintenance: install a battery monitor or Bluetooth module if available to track SOC and BMS events; keep storage SOC ~50% for long periods and recharge every 3–6 months.

Based on verified buyer feedback, correct charging and proper fusing are the most important steps to prevent BMS trips and early failures.

Value Assessment — Is $374.99 Worth It?

Let’s break down value. At $374.99 for a combined starter and deep‑cycle pack delivering 1280Wh, the cost per Wh is roughly $0.29/Wh (374.99 / 1280Wh).

Long‑term cost: with the claimed 4,000–15,000 cycles, even at the low end of 4,000 cycles the lifecycle cost per cycle becomes very low compared with lead‑acid that may only last a few hundred cycles. That makes LiFePO4 attractive when you cycle daily.

Amazon data shows this listing is in demand (Only left) and customer reviews indicate buyers find the bundle a competitive price compared with buying separate starter and deep‑cycle LiFePO4 units. If you need low upfront cost and infrequent cycling, a lead‑acid replacement may still be cheaper initially but costlier over time.

Recommendation scenarios:

• Buy it if: you need weight/space savings and frequent cycling for trolling or RV use.
• Skip if: you rarely cycle and want the lowest upfront cost, or need a high‑CCA starter beyond 800A for large engines.

Compare Alternatives on Amazon

We compared the Redodo 12V 100Ah LiFePO4 bundle with two common alternatives: Battle Born 12V 100Ah LiFePO4 and Renogy 12V 100Ah LiFePO4.

Battle Born 12V 100Ah (example): usually priced higher per unit but backed by a long track record and strong Amazon review counts; many buyers prefer their proven warranty and US‑based support. Battle Born typically lacks a bundled starter battery, so you’d buy a separate starter which raises total cost.

Renogy 12V 100Ah (example): mid‑tier price, broad solar accessory ecosystem, often bundled with mounting and wiring options. Like Battle Born, Renogy generally sells single batteries rather than a starter+house bundle.

Where Redodo wins: bundled starter + deep cycle at $374.99, competitive cost per Wh, and convenience. Where competitors may be superior: brand reputation, larger verified review counts, integrated accessory ecosystem, and longer public track records. Actionable tip: choose the Redodo bundle when you want a starter and house battery in one buy; choose Battle Born/Renogy if you value brand reputation and single‑battery warranty support.

Safety, Warranty & Support

Manufacturer claims include/7 customer service and lifetime technical support for integrated system applications. Based on verified buyer feedback, support responsiveness varies; keep purchase documentation and photos in case you need warranty service.

Warranty expectations: LiFePO4 warranties commonly range from 3–10 years depending on brand; confirm exact terms on the manufacturer product page at redodo.com or the Amazon listing here.

Action steps if things go wrong:

1. Document purchase with receipts and photos and register the battery if required.
2. If the BMS trips, check charging voltage and connections; record BMS error codes if available before contacting support.
3. Follow manufacturer instructions for returns, RMA, and shipping — UN38.3 is relevant for transportation of lithium cells.

Final Verdict — Should You Buy the Redodo 12V 100Ah LiFePO4?

The Redodo 12V 100Ah LiFePO4 bundle is a practical, well‑priced solution at $374.99 with Only left on Amazon; Amazon data shows strong buyer interest and customer reviews indicate good real‑world performance when installed with LiFePO4‑compatible charging.

We recommend it for boat owners and RVers who value weight/space savings and need a combined starter + house battery. If you prioritize long multi‑year warranty backing and an established brand reputation, consider Battle Born or Renogy instead.

Frequently Asked Questions

What is the best LiFePO4 battery on Amazon?

There isn’t a single “best” LiFePO4 battery for every use; the best depends on your needs. For compact marine dual-battery setups, the Redodo 12V 100Ah LiFePO4 bundle (ASIN B0FP31BRMP) is compelling because it pairs a 100Ah deep‑cycle unit with a 20Ah 800CCA starter at $374.99. For long-proven single-brand support, buyers often look at Battle Born or Renogy for similar 12V 100Ah cells.

What are the disadvantages of LiFePO4 batteries?

LiFePO4 batteries are safer and longer‑lasting than lead‑acid, but they have downsides: higher upfront cost, potential BMS compatibility issues with older alternators/chargers, and they require a LiFePO4 charging profile for fastest charging. Customer reviews indicate charging behavior and BMS trips are the most common pain points.

Which brand of LiFePO4 battery is best?

No single brand is best for every buyer. Based on verified buyer feedback, Battle Born and Renogy have strong track records and large Amazon review counts, while Redodo competes on price and bundling (starter + deep cycle). Choose by warranty terms, local support, and whether you need a starter+deep‑cycle bundle.

Do LiFePO4 batteries require special chargers?

Yes. LiFePO4 batteries require a charger or alternator set to a LiFePO4 charging profile (typically ~14.4V bulk, 13.6–13.8V float or manufacturer-recommended settings). Amazon data shows many buyers switch to LiFePO4-compatible chargers or a DC‑DC isolator to maintain correct charging.