I thought that was a trick question- to see if we were awake. With 120
polarity reversals/second on the line. :-)

Companies like Batteries Plus can replace the cells, sometimes with new
ones of higher a-h rating for _much_ less than buying new. E.g. 14.4v
P-C pack, 2.1 a-h vice 1.7 (or 1.5) orig, for $35, vice $64 for new.
Connections are spot-welded, pack gets extended test.

No affiliation with Co.

J