![arduino - Is it okay to connect 2 lithium ion battery in parallel to a charger that can maintenance 4.2V? (more detail in post) - Electrical Engineering Stack Exchange arduino - Is it okay to connect 2 lithium ion battery in parallel to a charger that can maintenance 4.2V? (more detail in post) - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/HZ2Bu.png)
arduino - Is it okay to connect 2 lithium ion battery in parallel to a charger that can maintenance 4.2V? (more detail in post) - Electrical Engineering Stack Exchange
![Understanding the characteristics of Li-ion batteries and Richtek power management solutions | Richtek Technology Understanding the characteristics of Li-ion batteries and Richtek power management solutions | Richtek Technology](https://www.richtek.com/~/media/Richtek/Design%20Support/Technical%20Documentation/AN023/EN/Version2/image006.png?file=preview.png)
Understanding the characteristics of Li-ion batteries and Richtek power management solutions | Richtek Technology
![batteries - Can I charge each Lithium ion battery, that are connected in series, with individual charger? - Electrical Engineering Stack Exchange batteries - Can I charge each Lithium ion battery, that are connected in series, with individual charger? - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/SlQhW.png)
batteries - Can I charge each Lithium ion battery, that are connected in series, with individual charger? - Electrical Engineering Stack Exchange
Is it possible to charge 2 3.7v batteries in series with a TP4056, if not, what circuit would I need? Is it at all possible to charge two 3.7v li-PO batteries in
![Charging protocols for lithium-ion batteries and their impact on cycle life—An experimental study with different 18650 high-power cells - ScienceDirect Charging protocols for lithium-ion batteries and their impact on cycle life—An experimental study with different 18650 high-power cells - ScienceDirect](https://ars.els-cdn.com/content/image/1-s2.0-S2352152X16300147-fx1.jpg)
Charging protocols for lithium-ion batteries and their impact on cycle life—An experimental study with different 18650 high-power cells - ScienceDirect
![battery charging - How can I use two TP4056 with two li-ion batteries, but single load? - Electrical Engineering Stack Exchange battery charging - How can I use two TP4056 with two li-ion batteries, but single load? - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/mj3Th.jpg)