I still have my old E6B from many years ago.
Back then I also bought, what was a new Electronic Calculator version from Sporty
($57 Ebay – you got to be kidding !!)
USELESS … even when turned off (electronically), it would still flatern the battery in 4-6 weeks !!!, so was always unreliable, unless you carried spare batteries.
Hopefully, the newer versions do not suffer from this.
$70 – and brand new …