Lithium-ion battery
The Nokia 3100 was developed from the Nokia 6100 as a successor to the Nokia 3510. The phone was Nokia's first in the youth-oriented 3000-series to be equipped with a 128×128 pixel passive colour display (4096 colors/12-bit), and included Java MIDP 1.0, XHTML and WAP browser, GPRS, Pop-Port connectivity and Lithium-ion battery. It is also capable of playing polyphonic MIDI files, which can be used as ringtones.