Amazon.com: Replacement Battery for Nokia 3120, 3125, 3600, 3620, 3650, 3660, 6030, 6085, 6086, 6108, 6175i Part NO Nokia BL-5C, BL-5CA Li-ion 1000mAh / 3.70Wh : Health & Household
100% New Bl-4u Battery For Nokia 3120c 5250 206 515 5330 5530 5730 Xm 6212c 300/301/305/308/310/311/500/501/515 - Mobile Phone Batteries - AliExpress
Nokia 3120 classic Specs - Technopat Database
3.7V Battery for Nokia 3120 Classic 3120C 500 BL-4U 1200mAh NEW | eBay
Battery Nokia compatible 301, 301-1, 3120 Classic, 3120C, 500, 515, 5530 XpressMusi, 6600 Slide, 8800 Arte, 8800 Carbon Arte Nok
Nokia 3120b Battery Installation Replacement - iFixit Repair Guide