Photo from the manufacturer
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Liontron LX Smart 12.8 V 150 Ah Arctic Untersitz is a lithium iron phosphate battery designed to replace the lead-acid battery under a camper van's seat. The electronics inside the case run two heating elements that use the charging current to keep the cells above zero: in an unheated compartment, in winter, charging doesn't stop. Several units go in parallel to grow in capacity; in series, to raise voltage, they don't.
The continuous current it allows through covers the onboard inverter with the fridge running at the same time. State of charge, voltage and current are read from the phone over Bluetooth, and the same app follows several batteries together for anyone installing more than one.
It's for anyone replacing the service battery under a camper van or caravan seat with one that offers more autonomy, who also wants to charge it in winter. Anyone looking for a module for a fixed technical compartment should look at another format.
| Parameter | Value | Source |
|---|---|---|
| Dimensions | 39.5 × 28 × 18.7 cm (15.6 × 11.0 × 7.4 in) | manufacturer website |
| Weight | 19.6 kg (43.2 lb) | manufacturer website |
| System voltage | 12 V | Declared by the brand |
| Capacity | 150 Ah | Declared by the brand |
| Cell chemistry | LFP (lithium iron phosphate) | Declared by the brand |
| Maximum discharge current | 150 A | Declared by the brand |
| Maximum charge current | 150 A | Declared by the brand |
| Low-temperature charge protection | Yes | Declared by the brand |
| Bluetooth monitoring | Yes | Declared by the brand |
| Ingress protection | IP65 | Declared by the brand |
| Rated cycles | 3000 cicli | Declared by the brand |
| Warranty | 10 anni | Declared by the brand |
| Guaranteed remaining capacity | 70 % | Declared by the brand |
| Capacity in kWh | — | Not declared |
| Capacity at end of cycle life | — | Not declared |
| Guaranteed throughput | — | Not declared |
| Official list price | — | Not declared |
A manual or a datasheet counts as a source even when the original file is hosted elsewhere: what matters is the document, not the server. Where that happens, it is stated above.
These numbers are calculated, not stated: they have no source to cite, they have a formula you can redo. The price used is the manufacturer's list price, which is stable and the same in every country — not a shop's price on the day.
