The following technology/pcb reviews are available

A Lithium Ionen Battery Managment PCB:

 

HX-JH-001 / 18650 BMS for (3S / 4S) config

AHX-JH-001 test BMS tutorial review Lithium Ionen Battery Managment PCB / LiPo BMS HX-JH-001 BMS
HX-JH-001 BMS

Mini WiFi Esp-Wroom-02 Modul ESP8266 with OLED and 18650 battery module

ESP8266 tutorial / review

 

Esp-Wroom-02 Modul ESP8266

ESP8266 test tutorial / review Esp Wroom-02 Modul ESP8266 with OLED 18650 battery module charger
Esp-Wroom-02 Modul ESP8266

LTC3780 DC Buck Boost Converter Modul Supply with 10A output current

LTC3780 tutorial / review

 

Linear LTC3780 / Step-down Step-up converter

LTC3780 test tutorial / review Linear LTC3780 / Step-down Step-up converter / Buck-Boost Converter LTC3780
HT20160328SJ - LTC3780 - DC/DC converter

Dipl.-Ing. Sebastian Meyer | Gronauer Str.15 | 61194 Niddatal/Germany | E-Mail: meyer@battech.de