Hey all
ive picked up a little 2.4Ghz remote control 4WD toy which runs on a small 4.8v rechargeable AAA battery pack. Performance off road is good but run time tends not to be too long and its recharged by a USB adaptor which takes forever to top up the cells.
what i was thinking of doing is running the beast on 2 x 18650 batts mounted inside it. I know they are 3.7v each making 7.4v , which is probably too much for the electronics inside the car , but reducing the voltage down to something more like 5v which it should handle. What are my options here ? a DCDC converter or some sort of low value ceramic resistor? I'm not worried about performance so much , more want to increase the run time and have precharged batteries in the field.