mainteneur de batterie

CONT: Battery maintainers supply a small trickle of electricity to your battery over a long period of time. This small stream of electricity will not fully charge the batteries, but will act to counter-act self-discharge. They help maintain the level of charge the battery had when used last.

CONT: El mantenedor de carga para baterías [...] nos permite mantener la batería de nuestro coche con un nivel de carga adecuado, en momentos en los que el vehículo no se usa.