Hand made Rechargeable Battery PACK For Sony Discman D555 D88 CD Players DIY
For circuit design with USB charging function, to use USB charging. It will need a TYPE-C cable and a 5V 500mah USB charger. The charger is not include. Output voltage is about 3.7-4.2 volts, it needs one or two [3.7V L-ion 10440] batteriesThe 3.7V. How long it can be used depends on your battery capacity. […more]