[ansible]

Just FYI, I don't recommend charging LiIon or LiPo batteries in parallel, as shown in one of the pictures.

There's a greater risk of fire or just general damage to the capacity of the batteries.

[kawsper]

For the small 1S batteries you can get this style of charger for $16 that will charge in parallel: https://www.amazon.com/Happymodel-Battery-Charger-Mobula7-Qu...

But for bigger batteries I recommend buying a charger that can handle 4 or more separate batteries at a time like the SkyRC Q200 or the Turnigy TQ4, or just do like me, charge each battery individually.