The original Nokia 2110 NHE-1XN a variant which is rather hard to find. I have rebuilt the battery in this one out of two dualshock 4 batteries I had laying around. Surprisingly
Sami Pippuri on Twitter: "This reminded me of #Nokia 2110 extended battery, around 1995 @TechCrunch @Grg https://t.co/506AzDH2yq" / Twitter
Gorba's Return
Cell Phone Batteries: Cell Phone Battery: NOKIA 2110
Nokia 2110 Mobile Phone Battery. Nokia 2110, 2110i Replacement for Nokia 2110 Mobile Phone