var acct = eth.accounts[0];
//Проверяем баланс
var acctBal = web3.fromWei(eth.getBalance(acct), "ether");

//Разблокируем аккант и отправляем ETH
if(personal.unlockAccount(eth.accounts[0], "notmyrealpassword", 300)) {
     web3.eth.sendTransaction({from:eth.accounts[0],
                               to:'0x4019Eb7A7Cca9eE9875EDe23C9Acb17a335Bce73',
                               value: "1.5"})
     .then(function(receipt, error) {
        console.log("" + error);
     });
} else {
 console.log("cannot unlock account");
}

/*
INFO [07-22|23:54:21.132] Submitted transaction                    fullhash=0xb2
44a19263250b8e88be9775e8427e126f7c8ad5c6fec328fa7c346d081d0ac6 recipient=0x35D22
e8820F62175447c87b99a02F48c81979b76
*/