Nokia 6021 running, showing default home screen. A 18650 battery is connected to it.
A stock battery from the phone laying on desk. The plastic front with 3 metal contact plates is detached.
The interior of the phone, where the battery once was. The detached battery part is soldered to contacts. Two wires are soldered, that allow connecting external power.
It still works! Only the battery was dead. Unfortunately I don't see any possibilitiy of using it in any useful way. The 3G networks are being phased out (still works here). It won't turn on without a SIM card.
#oldnokia