Field Charging 2-3S Lipo Batteries Using a Battery Bank

I made a similar video yesterday geared specifically for Axial SCX24 micro crawler RC owners but this method applies to helicopters, quads and plane owners too!
Not all field chargers will be able to charge at low amps, but I found one for y’all who run 350mah batteries and we can operate it with a PD power bank!
TIMESTAMPS:
1:34 Does not work for 1S batteries, nor 4S or higher. This method is only for 2-3S batteries.
1:57 Battery bank is super stealthy.
2:10 Glimpse of my home charger.
2:30 Limitations of battery bank charging.
3:42 Battery bank specs.
4:57 What happens if you don't use a PD battery bank? It won't work.
5:30 Setup, how stuff plugs into each other.
5:44 Inserting the balance port.
6:19 Sequence of connecting wires.
6:50 Demonstration of charging.
7:09 Screenshot of app in operation.
7:59 Why an error occurs on my particular battery bank.
8:42 How to prevent the error from happening.
9:34 What's so special about this particular charger?
10:29 Why is this old charger relevant now?
10:40 Pacifica, CA
10:56 Why the ISDT H605 Air is so unappreciated.
12:19 Why is it good that it only has 1 button?
12:55 Pricing of the gear.
13:57 Sizing mah.
14:27 How this project of looking for a field charging setup using a battery bank began.
15:27 Ebay charger considered but rejected because...
15:46 ToolkitRC M4 Pocket considered but didn't meet the critical criteria of low amp charging.

[@RadRaf]

Thanks for the vid. This was pretty useful. My main needs are 2S and 3S anyways max. However, I found an ISDT Q6 with charging amps that start at .1 Amp. I also paired it with their parallel adapter for multiple charging! Just sharing some options but I like the simplicity of your find! Thanks for sharing!

[@Funcentric]

Oh cool! I’ll check that out.

[@ns-es9vs]

gens ace dual charger charges under 1 amp and can run dc on a lipo maybe powerbank.

[@Funcentric]

Interesting. Cool. I’ll check it out.

[@Funcentric]

I looked it up. That’s overkill for charging small batteries. The Gens Ace dual channel one you’ve talking about is very similar to the Hota D6 Pro which is designed for much higher wattage that what can be powered by a small battery bank.
I’m sure the Gens Ace charger is a good one but totally for a different purpose than what I’m talking about in this video.