02.01.2026 • 14 Min.

Lithium-ion batteries contain 2–4 kWh of stored energy — enough to cause a serious fire if mishandled. This episode explains exactly how to store eFoil and jetboard batteries safely, protecting your home, your equipment, and your insurance coverage. What this episode covers: Why fireproof aluminum storage boxes are the current best practice — tested by E-SURFER since 2017 The Zarges box + Cirrux fireproof cushion combination: why this pairing outperforms alternatives Critical rule: one battery per box — storing multiple batteries together multiplies the risk exponentially Ideal storage conditions: 10–25°C, dry environment, 40–50% charge level What happens when a battery is dropped: invisible internal damage and when to contact the manufacturer Charging safety: always supervised, on a flat dry surface, never when the battery is cold Insurance implications: yacht and boat insurers increasingly require certified fireproof battery storage Regular inspection: cracks, bulges, corrosion, leaks — what to check for For most riders, a proper fireproof storage box is the single most important safety investment after the eFoil itself. Full article: https://www.e-surfer.com/en/blog/safe-storage-of-lithium- ion-batteries-for-efoils/ Battery storage solutions: https://www.e-surfer.com/en/shop/accessories/ E-SURFER — independent eFoil safety advice since 2017.