![batteries - How to charge two 18650s in series without a middle connection? - Electrical Engineering Stack Exchange batteries - How to charge two 18650s in series without a middle connection? - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/VJDto.png)
batteries - How to charge two 18650s in series without a middle connection? - Electrical Engineering Stack Exchange
![battery charging - Can I Charge 2 18650 with 2 TP4056 boards with single input - Electrical Engineering Stack Exchange battery charging - Can I Charge 2 18650 with 2 TP4056 boards with single input - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/pPsss.png)
battery charging - Can I Charge 2 18650 with 2 TP4056 boards with single input - Electrical Engineering Stack Exchange
![Adeept 2 Pcs 18650 Battery Holder with Wire and 2.54mm JST Connector, Batteries Connected in Series 7.4V, 2 Battery Holder, Battery Case for DIY (Batt Adeept 2 Pcs 18650 Battery Holder with Wire and 2.54mm JST Connector, Batteries Connected in Series 7.4V, 2 Battery Holder, Battery Case for DIY (Batt](https://www.adeept.com/u_file/2203/photo/c115b6942f.jpg)
Adeept 2 Pcs 18650 Battery Holder with Wire and 2.54mm JST Connector, Batteries Connected in Series 7.4V, 2 Battery Holder, Battery Case for DIY (Batt
![Overview of Batteries in Series or Parallel - Battery Products - Electronic Component and Engineering Solution Forum - TechForum │ Digi-Key Overview of Batteries in Series or Parallel - Battery Products - Electronic Component and Engineering Solution Forum - TechForum │ Digi-Key](https://global.discourse-cdn.com/digikey/original/2X/8/8ee52734ea7d06691a06dc128314107a01356cd8.png)