Charging the Beaulieu (2008s and 4008s, but also R16s) on the power bank or cell phone charger - this is how it works

[Dr. Thomas Faehrenkemper]

 It's actually quite simple, you take a DC-DC step-up converter, a USB-C connection, an RCA cable with a 3.5 mm plug and an LED with a 270 Ohm series resistor an assemble iti n a small housing, then adjust the charging voltage with the blue spindle trimmer so that the charging current is around 1/10 C, depending on the battery (or more, for shorter charging times) and you're done! So for a small 400 mAh battery from 2/3 AAA cells then 40 mA. Measured with an amp meter.

If you don't have a charging container, you can also charge directly in the camera.

The step-up converter is available from Amazon or Ebay as a small ready-made component, as are all the other parts, of course. Or in an electronics store, if you have one around the corner.

This works for the 2008, which is operated with 4 cells (4.8V) and of course also for the 4008 and R16, which have 6 cells and 7.2 V respectively.