![Auto cut off 3.7 volt Battery charger circuit using Relay, Simple 3.7 volt Battery charger - YouTube Auto cut off 3.7 volt Battery charger circuit using Relay, Simple 3.7 volt Battery charger - YouTube](https://i.ytimg.com/vi/c4G4imPG7dA/maxresdefault.jpg)
Auto cut off 3.7 volt Battery charger circuit using Relay, Simple 3.7 volt Battery charger - YouTube
![4 Simple Li-Ion Battery Charger Circuits - Using LM317, NE555, LM324 | Homemade Circuit Projects | Esquemas eletrônicos, Carregador, Circuito eletrônico 4 Simple Li-Ion Battery Charger Circuits - Using LM317, NE555, LM324 | Homemade Circuit Projects | Esquemas eletrônicos, Carregador, Circuito eletrônico](https://i.pinimg.com/736x/52/3a/b8/523ab81c7a1f2542763f9e2c0eda71ea.jpg)
4 Simple Li-Ion Battery Charger Circuits - Using LM317, NE555, LM324 | Homemade Circuit Projects | Esquemas eletrônicos, Carregador, Circuito eletrônico
![Electronic Circuits: Automatic Programmable 4.2V Battery Charge, Current up to 500mA using LTH7R IC with PCB Electronic Circuits: Automatic Programmable 4.2V Battery Charge, Current up to 500mA using LTH7R IC with PCB](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgVP0bdcPTdZSk9mddPzXupXfU5-b_huvA7fREM4-aaReEwywZXom84_raogkeptzZWWNpSZ1wg04skIM9fphNFNTiLPX7tzjdRRGRROPz0w63uspHi89xbitx68EUW9qlDy0hTPkRK-WUQqDxND_s8yY_b9a2yoT_yBUPlIWPQN7g1AcsWuOKiFmEAAw/s640/Automatic%20Programmable%204.2V%20Battery%20Charge,%20500mA%20using%20TH7R%20-%20ELC.png)