Safe and Covenient Functions

No water-refilling needed
(HV/EV except for LN4)

The special lid structure that recirculates the evaporated water generated inside the battery eliminates the need to refill the liquid until the end of the battery life.

Charge status at a glance
(PREMIUM PLUS/ECO/EN except for LN4)

With the indicator lamp showing the charging status, you can check at a glance whether the charge is sufficient or not.

Carrying handle attached
(PREMIUM PLUS/ECO/STANDARD/HV/EN except for LN0)

Comes with a handle that is convenient for carrying and replacing