Not for boats however.
I have four rechargeable cordless telephones in our house, one in the kitchen, one in our sitting room, and on the top floor, one in the bedroom and one by my computer, very useful, no having to run up and down two flights of stairs.
However the kitchen one after about a minute gives two bleeps, then a few seconds later cuts off, they all are sitting on charging units, does this mean - 1 the charging unit has failed, or 2 the re- chargeable batteries need replacing ? (or both )
Colin