Liontron LiFePO4 55Ah Marine IP67
IP67 sealed with submersion detection, 55 Ah for just 21.4 lb (9.7 kg): the Liontron Marine replaces a far heavier lead-acid battery in a small van or light boat.
Characteristics
- Capacity: 55 Ah, 704 Wh (12.8V LiFePO4)
- Weight: Just 21.4 lb (9.7 kg)
- Sealing: IP67 marine-rated, submersion detection
- Monitoring: Bluetooth 4.0, up to 4 batteries in parallel
- 55 Ah marine-sealed at 21.4 lb (9.7 kg), 7-year warranty
Detailed overview: Liontron 55Ah lithium battery, IP67 waterproof
The Liontron LiFePO4 55Ah Marine IP67 is a compact lithium leisure battery from German manufacturer Liontron, based in Nettetal, North Rhine-Westphalia. It's aimed at setups where space and weight matter as much as resistance to moisture: a light boat, small RV, compact van or backup solar setup.
Its 55 Ah capacity, 704 Wh at 12.8V, relies on a LiFePO4 chemistry rated for over 3,000 cycles at 90% depth of discharge, far beyond an equivalent lead-acid battery. The smart BMS allows up to 100 A continuous discharge (150 A peak for 20 seconds) and 100 A charging, enough to cover most everyday uses of a small 12V setup.
Its defining feature is IP67 sealing certified for marine use: a GORE vent membrane manages condensation, and automatic submersion detection shuts the battery down after prolonged contact with water. Reassuring aboard a boat or in a technical compartment exposed to splashing, without being aimed at an extreme environment.
Unlike the LXArctic versions in the range, this 55Ah has no built-in heating: charging is allowed between 32 °F and 113 °F (0 °C to 45 °C), a standard range for a lithium battery. Monitoring is handled via Bluetooth 4.0 and the Liontron app, which can track up to four batteries at once. The case, not glued and accessible via 4 screws, in theory allows a faulty cell to be replaced rather than scrapping the whole battery.
At just 21.4 lb (9.7 kg) on the scale, it's easy to handle and usefully replaces a far heavier and less durable lead-acid battery. Its 7-year manufacturer warranty and M8 terminals make it a reliable base for a small setup, provided you accept a price well above generic 12V LiFePO4 batteries on the market.
Full specifications
Detailed characteristics (EAN: 4260586371109)
Battery
| Technology?Battery chemistry; LiFePO4 lasts far longer and can be fully discharged, gel/AGM is maintenance-free and cheaper. | LiFePO4 (lithium) |
|---|---|
| Nominal voltage?Battery voltage (12, 24 or 48 V). | 12.8 V |
| Capacity?Capacity in amp-hours; multiply by voltage to get energy in Wh. | 55 Ah |
| Energy?Stored energy in watt-hours. | 704 Wh |
| Cycle life?Rated number of charge/discharge cycles, at the stated depth of discharge. | 3000 cycles (90 %) |
Power and protection
| Max discharge current (BMS)?Maximum current the BMS allows on discharge. | 100 A |
|---|---|
| Built-in BMS?Battery management system protecting against overcharge, deep discharge, short-circuit and overcurrent (lithium batteries). | Yes |
| Low-temperature protection / heating?Cuts off or heats charging in cold weather to protect the lithium cells. | Yes |
Connectivity
| Bluetooth?Monitoring and settings via an app over Bluetooth. | Yes |
|---|---|
| Wi-Fi?Remote control and updates over Wi-Fi. | No |
Durability and format
| Ingress protection?Water and dust resistance (IP rating). | IP67 |
|---|---|
| Maintenance-free?Sealed battery needing no water top-up (gel / AGM). | Yes |
| Weight?Weight of the battery. | 21.4 lb (9.7 kg) |
| Dimensions (L × W × H)?Length × width × height, in millimetres. | 13.7 × 6.7 × 6.7 in (348 × 170 × 169 mm) |
Availability and warranty
| Warranty?Length of the manufacturer's warranty. | 7 years |
|---|
Comparison
How does the Liontron LiFePO4 55Ah Marine compare to rival LiFePO4 leisure batteries?
| Criterion | Liontron 55Ah Marine | LiTime 50Ah | Renogy 100Ah |
|---|---|---|---|
| Capacity | 55 Ah | 50 Ah | 100 Ah |
| Weight | 21.4 lb (9.7 kg) | 11.1 lb (5.05 kg) | about 26.5 lb (12 kg) |
| Sealing | IP67 marine-rated | IP65 | IP67 |
| BMS (continuous discharge) | 100 A | 50 A | 150 A |
| Warranty | 7 years | 3 years | 2 years |
Against the far lighter and cheaper LiTime 50Ah, the Liontron stands out with a BMS twice as powerful, genuinely marine-rated sealing and a much longer warranty. The Renogy 100Ah offers nearly double the capacity for a much lower budget, but without the same level of marine certification. The Liontron remains the most rugged choice of the three for boat or damp-environment use.
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Our tester's review: Julien De Jurquet
This 55Ah is the little sister of the Arctic versions in the Liontron range: no built-in heating here, but the same care taken over sealing, with marine IP67 certification and submersion detection that shuts the battery down after prolonged contact with water. On the scale it reads 21.4 lb (9.7 kg), a real relief compared with an equivalent lead-acid battery, which easily tops 33 lb (15 kg). The Bluetooth app clearly shows charge state and voltage, and can track several batteries in parallel if the setup grows. The 100 A continuous BMS is solid for everyday use, without being the most generous on the market at this price. The one real downside: without the Arctic function, it cuts off charging below 32 °F (0 °C) like most lithium batteries, which limits its appeal in deep winter compared with the Arctic versions in the range. For a compact setup that needs protection from moisture rather than frost, it remains a solid choice.
Frequently asked questions: Liontron 55Ah lithium battery, IP67 waterproof
Yes, it's certified IP67 for marine use, with a GORE vent membrane and automatic submersion detection that shuts the battery down after prolonged contact with water. It's not designed for permanent submersion.
No, this 55Ah version doesn't include the Arctic function. Charging is allowed between 32 °F and 113 °F (0 °C to 45 °C), a standard range for a lithium battery. For charging in deep cold, see the LXArctic versions in the Liontron range (100Ah and 200Ah, down to -22 °F / -30 °C).
It weighs 21.4 lb (9.7 kg), versus 33 to 44 lb (15 to 20 kg) for a lead-acid battery of comparable usable capacity, a significant weight saving for a mobile setup like a van or small boat.
Yes, via Bluetooth 4.0 and the Liontron app, which displays charge state, voltage and current, and can track up to four batteries wired in parallel.
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Published on 04/09/2026