Charging one battery with multiple chargers

[scootergrisen]

In another topic i asked about Charging two batteries with one charger.

Now I saw this video about using multi chargers to charge one battery.

Is that fine or which problems are there connecting multiple chargers to the same battery?

[youtube]uzQDxviCQyE[/youtube]

 

[john61ct]

The problems come if they are not similar chemistries or if one is approaching EoL.

Parallel boards with each circuit fused is what makes it safe

FMA is gone, but these guys sell good units generally

https://www.buddyrc.com/products/isdt-safe-parallel-charge-adapter?variant=30274404745302

 

[Etni]

It's doable, I've used this cable for charging my battery-upgraded Onewheel with two stock chargers: https://two-x.com/products/charge-x . However, you can't just connect two chargers directly in parallel, it needs to have some kind of circuitry, but I can't go into specifics because I don't know what I'm talking about.

Slower charging is better for the battery, so this double (or triple?) charging should be done only when in a hurry. You should also check that everything in the board can handle the double current. Not only the battery cells, but also the BMS, charging port, cables, connectors etc.