ZYGY 5PCS 3.7V 500mah Lithium Battery with 5 in 1 Charger for DE35 DE38 DE40 DE50 TB202 TB201 TM201 TM202 TC141 DE44 DE55 TS201 TD202 TD161 Remote Control Car Toy Car Battery:
Make A Simple 3.7v Li-ion Battery Charger Circuit Using TC3582DA IC - TechSaw
3.7 volt battery charger with low & full level indicator - YouTube