More power (literally) for the HP-41, follow-up.

[Chr Yoko]

Correct, no need of the great [SKYRC iMAX B6AC V2] with that small HP-41 pack because the pack has its own USB-C to Li-Ion charging circuit + an internal (to the pouch) BMS (Battery Management System) that will prevent over charging, undervoltage and over current.

The SKYRC charger is used for Li-Ion cells that do not have any BMS included as the charger is providing the required protections during charging if used correctly (many options into its menus). Better use such charger or you really need to know what you are doing. Also always use a protective fireproof bag as Lithium and the electrolytes will burn with an heavy white toxic smoke .

Most LiPo's pouches (and cylindrical 18650, 21700...) with no BMS are used for RC cars, planes, drones as it is necessary to get a maximum of Amperes out of the cell. Usual BMSs aren't able to provide all that current.
The SKYRC can also work with cells in series. It has a balancing connector : you can wire the balancing wires between each cell to manage the load balancing to make sure that all cells have the same voltage at the end of charging.

I use such charger on NiMh (you can chose the cells chemistries in the menu) for my home made packs on HP-75 and HP-97 without balancing. I can use also my variable power supply with charging voltage (ie:6V) and a max safe current (ie:500mA).