storage battery

NOUN /stoʊrɪdʒ_'bætəri/
15 LETTERS · 4 SYLLABLES · STARTS WITH S

storage battery is a valid 15-letter word worth 20 points in Scrabble and 21 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
S1T1O1R1A1G2E1B3A1T1T1E1R1Y4
1 + 1 + 1 + 1 + 1 + 2 + 1 + 0 + 3 + 1 + 1 + 1 + 1 + 1 + 4 =20 PTS
DOUBLE WORD → 40TRIPLE WORD → 60
MEANING

What does storage battery mean?