Essential battery safety and storage guide for eFoil owners

Electric hydrofoil batteries are high-energy components that demand a routine of careful handling, smart storage and disciplined charging to keep you riding and avoid accidents. Start with transport: airlines enforce strict rules for lithium batteries, and most require packs to be carried in cabin. Never assume—check your airline's official policy and supply your pack's Wh rating when booking. For ground travel, protect terminals from short circuits by covering them, use padded cases, and avoid stacking heavy gear on top of packs.

Storage choices directly affect longevity and safety. Store long-term at roughly 40–60 percent state of charge; leaving a pack at 100 percent or fully depleted promotes cell stress. Keep packs in a cool, dry spot—15–25°C is ideal—and avoid freezing conditions or garages that regularly exceed 35°C. Store batteries away from flammable materials, segregate multiple packs so a single failure can’t spread, and keep a Class D or multi-purpose extinguisher within reach.

Daily care and charging habits matter. Use only manufacturer-approved chargers and follow recommended charging routines. Charge in a monitored, well-ventilated area and never inside sleeping spaces. Inspect packs before and after rides: check for swelling, unusual heat, rapid self-discharge or casing deformation, and retire any pack that shows physical damage.

If a pack is punctured, swollen or gives off unusual odors, move it outdoors to a non-flammable surface away from people and structures and contact the manufacturer for disposal instructions. If a pack overheats while charging or in use, cut power, separate it from combustibles and monitor closely. Be prepared to drench a venting cell with water only if the manufacturer explicitly recommends that action; otherwise follow the manufacturer’s emergency guidance.

Make inspections routine. Verify case integrity for cracks or bulges, ensure terminals and connectors are secure and corrosion-free, confirm charger cable insulation and connector pins are intact, and apply firmware or controller updates when the manufacturer recommends them to keep charge profiles safe.

When a pack reaches end-of-life, follow local hazardous-waste rules and manufacturer take-back programs. Do not throw lithium packs in household trash.

Practical foiler steps: carry a small battery data card in your travel kit listing nominal Wh, serial number and emergency contacts; for weekend trips store packs at a partial SoC and plan to top up on reliable shore power; avoid trying to fully recharge multiple depleted packs in series on sketchy shore circuits. Treat eFoil batteries like high-value, high-energy cargo: careful transport, smart storage SoC, approved chargers and early inspection prevent most problems and extend pack life.