☃Multi-Cell 2S 3S 4S Type-C To 8.4V 12.6V 16.8V Step-Up Boost LiPo Polymer Li-Ion Charger 7.4V 11.1V | Shopee Philippines
![A circuit to use 2 single cell li-po / li-on batteries in series and charge them in parallel – 42 Bots A circuit to use 2 single cell li-po / li-on batteries in series and charge them in parallel – 42 Bots](https://42bots.com/wp-content/uploads/2017/06/DTDT-Switch-2S-Battery-parallel-Charging-series-use.jpg)
A circuit to use 2 single cell li-po / li-on batteries in series and charge them in parallel – 42 Bots
![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)
battery charging - How can I use two TP4056 with two li-ion batteries, but single load? - Electrical Engineering Stack Exchange
Impact of Individual Cell Parameter Difference on the Performance of Series–Parallel Battery Packs | ACS Omega
![Parallel battery pack charging strategy under various ambient temperatures based on minimum lithium plating overpotential control - ScienceDirect Parallel battery pack charging strategy under various ambient temperatures based on minimum lithium plating overpotential control - ScienceDirect](https://ars.els-cdn.com/content/image/1-s2.0-S2589004222005132-fx1.jpg)