1.5V乾電池を直接触っただけでは感電死することはないでしょう。

.。

You probably won't die of electrocution just from touching a 1.5V dry cell battery.

Literal

1.5V dry-cell [object-を] directly touched [only-だけ][with-では] electrocution-death do [nominalizer-こと][topic-は] not-exist [probably-でしょう].

乾電池 'dry cell battery.' 感電死 'death by electrocution' — 感電 'electric shock' + 死 'death.' ~だけでは…ない 'just doing X won't...' limits the scope. ことはないでしょう is a formal way of saying 'it probably won't happen.' A reassuring statement about electrical safety.